Gem Recipe Compendium

All gem stats · special tower recipes · slab materials — every number on this page is read straight from the game engine tables and always matches the game.

How Gem TD plays:This is the browser version of Gem TD, the classic Warcraft 3 tower defense map. Each round, the build phase has you place 5 stones (each randomly becomes one of 8 gem types), and gems act as towers and maze walls at the same time; in the pick phase you keep only 1 gem while the rest turn into stone blocks that keep forming the maze. Complete a recipe and you can combine special towers and slabs. Topaz gem towers and the Slow Slab use chaos attacks — they ignore magic and physical immunity, the core counter against double-immune waves.

Solo maze tips:Folding the creep path into a spiral with stones pays off the most — wall off the corridor entrances between checkpoints so every wave takes an extra lap; amethyst is air only and diamond is ground only, so keep anti-air firepower ready for the flying waves every 4th wave; veteran towers hit harder as their kill count grows, and using one as a material passes its kill level on to the new tower.

1. Gem compendium (8 types × 6 levels)

Each round your 5 stones randomly become one of the 8 gems below; merge 2 identical gems of the same level to go up 1 level, 4 to go up 2, topping out at the level 6 Giant.

RubyCode R

Splash: enemies in range take full damage · Air and ground

Level	Damage	Interval	Range
Cracked	9	1s	205px
Flawed	15	1s	205px
Common	23	1s	205px
Flawless	42	1s	205px
Perfect	92	1s	222px
Giant	140	0.75s	222px

Cracked: Splash 31px, full damage

Flawed: Splash 31px, full damage

Common: Splash 37px, full damage

Flawless: Splash 37px, full damage

Perfect: Splash 37px, full damage

Giant: Splash 43px full damage · Hits 3 targets at once · Bloodlust (every 3s, nearby towers gain +45% attack speed for 15s)

Sapphire gem icon - GemTD Sapphire stats

SapphireCode B

Ice slow: hits slow by 20% · Air and ground

Level	Damage	Interval	Range
Cracked	7	1s	152px
Flawed	12	1s	196px
Common	19	1s	205px
Flawless	35	1s	214px
Perfect	68	1s	310px
Giant	200	1s	416px

Cracked: Slow 20%

Flawed: Slow 20%

Common: Slow 20%

Flawless: Slow 20%

Perfect: Slow 20%

Giant: Slow 20% AoE · Super long range · Bash (10% chance for +1000 damage and a 0.5s stun)

TopazCode Y

Multi attack (hits several targets at once) · Chaos attack (ignores magic and physical immunity) · Air and ground

Level	Damage	Interval	Range
Cracked	4	0.8s	152px
Flawed	8	1s	152px
Common	14	1s	152px
Flawless	25	1s	152px
Perfect	75	1s	170px
Giant	250	1s	187px

Cracked: Hits 3 targets at once · Chaos attack

Flawed: Hits 3 targets at once · Chaos attack

Common: Hits 4 targets at once · Chaos attack

Flawless: Hits 4 targets at once · Chaos attack

Perfect: Hits 5 targets at once · Chaos attack

Giant: Hits 7 targets at once · Chaos attack · Flame (every 5s, 352px burst for 1500 damage + burn 200/s for 10s)

EmeraldCode G

Poison damage over time plus a slow · Air and ground

Level	Damage	Interval	Range
Cracked	6	0.8s	152px
Flawed	12	1s	161px
Common	20	1s	170px
Flawless	34	1s	187px
Perfect	85	1s	205px
Giant	220	1s	222px

Cracked: Poison 2/s for 3s, slow 15%

Flawed: Poison 3/s for 4s, slow 20%

Common: Poison 5/s for 5s, slow 25%

Flawless: Poison 8/s for 6s, slow 35%

Perfect: Poison 16/s for 8s, slow 50%

Giant: Poison 25/s for 20s, slow 75% · Disease Cloud (500/s/62px)

Amethyst gem icon - GemTD Amethyst stats

AmethystCode P

Air only (official: Attacks air only) · Air only

Level	Damage	Interval	Range
Cracked	11	0.8s	240px
Flawed	22	1s	262px
Common	35	1s	284px
Flawless	68	1s	293px
Perfect	145	1s	328px
Giant	375	1s	354px

Cracked: Air only

Flawed: Air only

Common: Air only

Flawless: Air only

Perfect: Air only

Giant: Air only · Faerie Fire (on hit, -5 armor)

DiamondCode D

Ground only, 25% chance to crit ×2 (all levels, official) · Ground only

Level	Damage	Interval	Range
Cracked	10	0.8s	152px
Flawed	17	1s	161px
Common	34	1s	170px
Flawless	62	1s	178px
Perfect	145	1s	196px
Giant	325	1s	214px

Cracked: 25% crit ×2

Flawed: 25% crit ×2

Common: 25% crit ×2

Flawless: 25% crit ×2

Perfect: 25% crit ×2

Giant: 25% ×2 · 5.5% ×3 · 4% ×9 · 2.5% ×15, four crit tiers

Aquamarine gem icon - GemTD Aquamarine stats

AquamarineCode Q

Short range, very fast attack speed (official: Fast attack speed) · Air and ground

Level	Damage	Interval	Range
Cracked	7	0.35s	126px
Flawed	14	0.35s	128px
Common	27	0.35s	131px
Flawless	52	0.35s	139px
Perfect	110	0.35s	161px
Giant	280	0.35s	170px

Cracked: 0.35s attack speed

Flawed: 0.35s attack speed

Common: 0.35s attack speed

Flawless: 0.35s attack speed

Perfect: 0.35s attack speed

Giant: 0.35s attack speed · Attack speed aura +10%/264px · Smash (50% chance for 300 damage)

OpalCode E

Attack speed aura: gems in range attack faster · Air and ground

Level	Damage	Interval	Range
Cracked	5	0.8s	170px
Flawed	10	1s	187px
Common	20	1s	205px
Flawless	40	1s	222px
Perfect	85	1s	240px
Giant	180	1s	328px

Cracked: Attack speed aura +10%/106px

Flawed: Attack speed aura +15%/123px

Common: Attack speed aura +20%/142px

Flawless: Attack speed aura +25%/159px

Perfect: Attack speed aura +35%/176px

Giant: Attack speed aura +50%/263px · Inner Fire (nearby tower damage +15%)

2. Special tower recipes (48 towers)

The 5 gems of the current round plus towers already on the field all work as materials; the kill count of consumed towers carries over and adds up on the new tower (1 level per 10 kills, +10% attack damage per level).

BasicBasic towers (6)

Silver - GemTD special tower Silver art and stats

SilverBasicAir and ground

Damage41Interval1sRange (on field)161pxBase gemSapphire

Recipe:

Sapphire·Lv1Diamond·Lv1Topaz·Lv1

Splash 44px, full damageSlow 20% for 2s

Splash hits for full damage in 44px plus 20% ice slow. An early-game powerhouse.

Pink Diamond - GemTD special tower Pink Diamond art and stats

Pink DiamondBasicGround only

Damage356Interval0.75sRange (on field)205pxBase gemDiamond

Recipe:

Diamond·Lv5Diamond·Lv3Topaz·Lv3

10% crit ×5

Ground only. 10% chance for 5x crit (official PinkDiamond).

Malachite - GemTD special tower Malachite art and stats

MalachiteBasicAir and ground

Damage24Interval0.35sRange (on field)196pxBase gemOpal

Recipe:

Emerald·Lv1Aquamarine·Lv1Opal·Lv1

Hits 3 targets at once

0.35s attack speed, hits 3 targets at once.

Star Ruby - GemTD special tower Star Ruby art and stats

Star RubyBasicAir and ground

Damage35Interval0.25sRange (on field)111pxBase gemRuby

Recipe:

Ruby·Lv2Ruby·Lv1Amethyst·Lv1

Burning aura 40/s/47px

Area burn aura of 40/sec (official StarRuby).

Jade - GemTD special tower Jade art and stats

JadeBasicAir and ground

Damage84Interval0.5sRange (on field)205pxBase gemEmerald

Recipe:

Emerald·Lv3Opal·Lv3Sapphire·Lv2

Poison 5/s for 2sSlow 50% for 2s

Poison 5/sec plus 50% slow (official Jade).

Red Crystal - GemTD special tower Red Crystal art and stats

Red CrystalBasicAir only

Damage141Interval0.8sRange (on field)293pxBase gemAmethyst

Recipe:

Emerald·Lv4Ruby·Lv3Amethyst·Lv2

5 anti-air armor break (air creeps)Burning aura 50/s/132px

Air only! Air units take -5 armor plus an Immolation aura of 50/sec (official RedCrystal v2.9 Immolation).

MidMid towers (12)

Silver Knight - GemTD special tower Silver Knight art and stats

Silver KnightMidAir and ground

Damage228Interval1sRange (on field)196pxBase gemSapphire

Recipe:

SilverAquamarine·Lv2Ruby·Lv3

Splash 44px, full damageSlow 20% for 2sBerserk (own attack speed +50%)

High-damage splash with ice slow and Berserk (+50% own attack speed). A mid-game core (official SilverKnight).

Vivid Malachite - GemTD special tower Vivid Malachite art and stats

Vivid MalachiteMidAir and ground

Damage66Interval0.35sRange (on field)205pxBase gemOpal

Recipe:

MalachiteDiamond·Lv2Topaz·Lv3

Hits 4 targets at once

0.35s attack speed, hits 4 targets at once (official VividMalachite).

Uranium 238 - GemTD special tower Uranium 238 art and stats

Uranium 238MidAir and ground

Damage152Interval0.25sRange (on field)143pxBase gemTopaz

Recipe:

Topaz·Lv5Sapphire·Lv3Opal·Lv2

Hits 6 targets at onceBurning aura 130/s/79px slow 25%

Burning aura of 130/sec with 25% slow, hits 6 targets at once (official Uranium: area burn and slow).

Volcano - GemTD special tower Volcano art and stats

VolcanoMidAir and ground

Damage152Interval1sRange (on field)209pxBase gemRuby

Recipe:

Star RubyRuby·Lv4Amethyst·Lv3

Burning aura 50/s/88px

Red Volcano: attacks for about 40 red dragonfire every 1.0s; Immolation aura deals 50/sec in 88px, +5/sec per 10 kills (100/sec at 100 kills).

Bloodstone - GemTD special tower Bloodstone art and stats

BloodstoneMidAir and ground

Damage247Interval0.5sRange (on field)187pxBase gemRuby

Recipe:

Ruby·Lv5Aquamarine·Lv4Amethyst·Lv3

20% chain lightning 60 ×4 jumps (×0.8 per jump)Burning aura 50/s/88px

20% chain lightning plus an area burn aura of 50/sec (official BloodStone: LV1 area burn).

Grey Jade - GemTD special tower Grey Jade art and stats

Grey JadeMidAir and ground

Damage196Interval0.5sRange (on field)205pxBase gemEmerald

Recipe:

JadeSapphire·Lv4Aquamarine·Lv3

Poison 10/s for 3sSlow 50% for 2sNearby tower range +15

Poison 10/sec plus 50% slow and +15 range for nearby towers.

Gold - GemTD special tower Gold art and stats

GoldMidAir only

Damage405Interval1sRange (on field)205pxBase gemAmethyst

Recipe:

Amethyst·Lv5Amethyst·Lv4Diamond·Lv2

25% crit ×2On hit, armor -5

Air only. 25% chance for 2x crit plus -5 armor (official Gold).

Dark Emerald - GemTD special tower Dark Emerald art and stats

Dark EmeraldMidAir and ground

Damage248Interval1sRange (on field)192pxBase gemEmerald

Recipe:

Emerald·Lv5Sapphire·Lv4Topaz·Lv2

13% stun for 1.5s

Dark Emerald: attacks for about 120 poison arrows every 1.0s; 12.5% chance to stun for 1.5s.

Paraiba Tourmaline - GemTD special tower Paraiba Tourmaline art and stats

Paraiba TourmalineMidAir and ground

Damage241Interval0.75sRange (on field)214pxBase gemAquamarine

Recipe:

Aquamarine·Lv5Opal·Lv4Aquamarine·Lv2Emerald·Lv2

On hit, target armor and magic resist -48% frost nova: 120 magic damage + 35% slow in 88px

Hits reduce armor by 4 and magic resist by 4%, plus 8% Frost Nova (120 spell damage with 35% slow) (official Paraiba: chance of Frost Nova).

Deep Sea Pearl - GemTD special tower Deep Sea Pearl art and stats

Deep Sea PearlMidAir and ground

Damage154Interval0.6sRange (on field)187pxBase gemOpal

Recipe:

Aquamarine·Lv4Diamond·Lv4Opal·Lv2

Magic resist ward 160px (nearby towers cannot be disarmed)Reveal aura 160px (detects invisible)

Nearby towers are immune to Disarm (Magic Barrier 160px); a 160px reveal aura (bane of invisible waves).

Black Cat Eye - GemTD special tower Black Cat Eye art and stats

Black Cat EyeMidAir and ground

Damage180Interval1sRange (on field)170pxBase gemOpal

Recipe:

Opal·Lv5Diamond·Lv4Aquamarine·Lv3

Nearby tower attack speed +20%/210pxDamage aura +30%/176px

Nearby towers gain +20% attack speed in 210px and +30% damage in 176px.

Yellow Sapphire - GemTD special tower Yellow Sapphire art and stats

Yellow SapphireMidAir and ground

Damage240Interval1sRange (on field)205pxBase gemSapphire

Recipe:

Sapphire·Lv5Ruby·Lv4Topaz·Lv4

Splash 70px, full damageOn-hit slow 20%/1.5s (refreshes)Damage aura +5%/106px

70px splash with 20% ice slow plus an aura of +5% damage for nearby towers (official YellowSapphire v2.7).

AdvancedAdvanced towers (14)

Huge Pink Diamond - GemTD special tower Huge Pink Diamond art and stats

Huge Pink DiamondAdvancedGround only

Damage825Interval0.65sRange (on field)214pxBase gemDiamond

Recipe:

Pink DiamondSilver KnightSilver

10% crit ×8

Ground only. 10% chance for 8x crit (official GreatPinkDiamond).

Uranium 235 - GemTD special tower Uranium 235 art and stats

Uranium 235AdvancedAir and ground

Damage307Interval0.25sRange (on field)170pxBase gemTopaz

Recipe:

Uranium 238MalachiteVivid Malachite

Hits 6 targets at onceBurning aura 180/s/106px slow 30%3% crit ×50

Burning aura of 180/sec with 30% slow, hits 6 targets at once, plus 2.5% chance for 50x crit (official Uranium235).

Ancient Bloodstone - GemTD special tower Ancient Bloodstone art and stats

Ancient BloodstoneAdvancedAir and ground

Damage614Interval0.8sRange (on field)187pxBase gemRuby

Recipe:

BloodstoneVolcanoRuby·Lv2

25% forked lightning 160 ×5 targetsBurning aura 50/s/88px15% crit ×3

25% forked lightning plus burn and 15% chance for 3x crit.

Monkey King Jade - GemTD special tower Monkey King Jade art and stats

Monkey King JadeAdvancedAir and ground

Damage307Interval0.35sRange (on field)214pxBase gemEmerald

Recipe:

Grey JadeEmerald·Lv4Amethyst·Lv2

Poison 10/s for 4sSlow 50% for 2sNearby tower range +15True strike aura (nearby towers never miss, ignores evasion)

0.35s attack speed poison, a range aura and a true strike aura.

Lucky Asian Jade - GemTD special tower Lucky Asian Jade art and stats

Lucky Asian JadeAdvancedAir and ground

Damage300Interval0.35sRange (on field)214pxBase gemEmerald

Recipe:

Red CrystalJadeEmerald·Lv3

Poison 25/s for 4s1% greed (bonus gold)1% stun for 2s5% crit ×4

Lucky Asian Jade: golden blades every 0.35s; poison 25/sec with 45% slow (4s); Lucky Charm: 1% chance for gold (wave/2), 1% chance to stun for 2s, 5% chance for 4x crit.

Charming Lazurite - GemTD special tower Charming Lazurite art and stats

Charming LazuriteAdvancedAir only

Damage305Interval0.8sRange (on field)310pxBase gemAmethyst

Recipe:

Red CrystalAmethyst·Lv4Topaz·Lv2

6 anti-air armor break (air creeps)Burning aura 65/s/150px

Air only. Air units take -6 armor plus an Immolation aura of 65/sec (official RedCrystalFacet).

Egyptian Gold - GemTD special tower Egyptian Gold art and stats

Egyptian GoldAdvancedAir only

Damage744Interval0.75sRange (on field)205pxBase gemAmethyst

Recipe:

GoldAmethyst·Lv5Aquamarine·Lv2

30% crit ×2On hit, armor -81% greed (bonus gold)

Air only. 30% chance for 2x crit, -8 armor and Greed (official EgyptianGold).

Emerald Golem - GemTD special tower Emerald Golem art and stats

Emerald GolemAdvancedAir and ground

Damage837Interval0.7sRange (on field)187pxBase gemEmerald

Recipe:

Dark EmeraldGoldDiamond·Lv3

13% stun for 1.5s15% crit ×4

Enchanted Emerald: attacks for 100-200 poison arrows every 0.7s; 12.5% chance to stun for 1.5s plus 15% chance for 4x crit.

Carved Tourmaline - GemTD special tower Carved Tourmaline art and stats

Carved TourmalineAdvancedAir and ground

Damage666Interval0.6sRange (on field)222pxBase gemAquamarine

Recipe:

Dark EmeraldParaiba TourmalineEmerald·Lv2

10% stun for 1sOn hit, target armor and magic resist -610% frost nova: 220 magic damage + 40% slow in 106px

10% stun, hits reduce armor by 6 and magic resist by 6%, plus 10% Frost Nova (official ParaibaFacet).

Red Coral - GemTD special tower Red Coral art and stats

Red CoralAdvancedAir and ground

Damage404Interval0.6sRange (on field)187pxBase gemOpal

Recipe:

Deep Sea PearlBlack Cat EyeOpal·Lv4

Nearby tower attack speed +20%/210pxDamage aura +30%/176pxMagic resist ward 200px (nearby towers cannot be disarmed)Reveal aura 200px (detects invisible)

Nearby towers are immune to Disarm (Magic Barrier 200px) plus attack speed and damage auras; a 200px reveal aura (bane of invisible waves).

Northern Saber Eye - GemTD special tower Northern Saber Eye art and stats

Northern Saber EyeAdvancedAir and ground

Damage735Interval0.8sRange (on field)214pxBase gemSapphire

Recipe:

Yellow SapphireBloodstoneSapphire·Lv5

Splash 70px, full damageOn-hit slow 20%/1.5s (refreshes)30% chain lightning 200 ×5 jumps (×0.8 per jump)Damage aura +8%/123px

Splash with ice slow, 30% chain lightning and an aura of +8% damage for nearby towers.

Faceted Stone - GemTD special tower Faceted Stone art and stats

Faceted StoneAdvancedAir only

Damage241Interval0.8sRange (on field)310pxBase gemRuby

Recipe:

Star RubyRuby·Lv5Amethyst·Lv3

5 anti-air armor break (air creeps)

Reduces air unit armor by 5 (1760px aura, air only); an upgraded Star Ruby (4.05 pro).

Blood Volcano - GemTD special tower Blood Volcano art and stats

Blood VolcanoAdvancedAir and ground

Damage355Interval0.5sRange (on field)170pxBase gemRuby

Recipe:

VolcanoRuby·Lv5Ruby·Lv4

Burning aura 130/s/770px

Fire aura: 130 damage per second within 770px (65 every half second); an upgraded Volcano.

Huge Malachite - GemTD special tower Huge Malachite art and stats

Huge MalachiteAdvancedAir and ground

Damage250Interval0.5sRange (on field)205pxBase gemOpal

Recipe:

Vivid MalachiteOpal·Lv5Opal·Lv4

Hits 20 targets at once

Hits every target in range (all enemies within 800px); an upgraded Vivid Malachite.

TopTop towers (8)

Koh-i-Noor - GemTD special tower Koh-i-Noor art and stats

Koh-i-NoorTopGround only

Damage3025Interval0.5sRange (on field)328pxBase gemDiamond

Recipe:

Huge Pink DiamondAmethyst·Lv6Diamond·Lv6

25% crit ×4

Top-tier crits (official UberStone-class stats).

Crown Prince - GemTD special tower Crown Prince art and stats

Crown PrinceTopAir and ground

Damage1424Interval0.8sRange (on field)222pxBase gemRuby

Recipe:

Ancient BloodstoneRuby·Lv6Emerald·Lv6

35% forked lightning 400 ×6 targetsBurning aura 100/s/106px

The ultimate lightning king.

Cullinan Diamond - GemTD special tower Cullinan Diamond art and stats

Cullinan DiamondTopAir and ground

Damage1732Interval0.5sRange (on field)293pxBase gemEmerald

Recipe:

Monkey King JadeDiamond·Lv6Sapphire·Lv6

Poison 25/s for 8sSlow 50% for 2sNearby tower range +15True strike aura (nearby towers never miss, ignores evasion)

The strongest single-target poison in the game.

Golden Jubilee - GemTD special tower Golden Jubilee art and stats

Golden JubileeTopAir only

Damage808Interval0.8sRange (on field)328pxBase gemAmethyst

Recipe:

Charming LazuriteTopaz·Lv6Ruby·Lv6

7 anti-air armor break (air creeps)Attacks apply 15% burning splash

Top-tier anti-air, attacks add a 15% burning splash.

Star Adam - GemTD special tower Star Adam art and stats

Star AdamTopAir and ground

Damage1611Interval0.5sRange (on field)258pxBase gemAquamarine

Recipe:

Carved TourmalineEmerald·Lv6Amethyst·Lv6

15% stun for 1.5sOn hit, target armor and magic resist -815% crit ×4

Top-tier control and crits.

Carmen Lucia - GemTD special tower Carmen Lucia art and stats

Carmen LuciaTopAir and ground

Damage870Interval1sRange (on field)170pxBase gemOpal

Recipe:

Red CoralOpal·Lv6Aquamarine·Lv6

Nearby tower attack speed +100%/264pxDamage aura +50%/264pxMagic resist ward 264px (nearby towers cannot be disarmed)Reveal aura 264px (detects invisible)

Otomad: nearby towers gain +100% attack speed and +50% damage, plus Magic Barrier (Disarm immunity) and a reveal aura (all 264px, inherited from Red Coral).

Star Sapphire - GemTD special tower Star Sapphire art and stats

Star SapphireTopAir and ground

Damage880Interval0.75sRange (on field)275pxBase gemSapphire

Recipe:

Yellow SapphireSapphire·Lv6Emerald·Lv6

Splash 70px, full damageOn-hit slow 20%/1.5s (refreshes)Slow 48% for 2s

Top-tier ice control (official GreatSapphire-class range).

Rose Quartz - GemTD special tower Rose Quartz art and stats

Rose QuartzTopAir only

Damage1192Interval0.8sRange (on field)328pxBase gemDiamond

Recipe:

Huge Pink DiamondDiamond·Lv5Amethyst·Lv4

6 anti-air armor break (air creeps)Burning aura 50/s/330px

Reduces air unit armor by 6 (1850px aura) and scorches enemies within 330px for 50/sec (air only); an upgraded Huge Pink Diamond.

TreasureTreasure towers (8)

Agate - GemTD special tower Agate art and stats

AgateTreasureAir and ground

Damage370Interval0.4sRange (on field)222pxBase gemOpal

Recipe:

Emerald·Lv5Opal·Lv5Aquamarine·Lv5

Hits 7 targets at once

Single-round combo: Flawless Emerald + Flawless Opal + Flawless Aquamarine.

Obsidian - GemTD special tower Obsidian art and stats

ObsidianTreasureAir and ground

Damage468Interval0.5sRange (on field)187pxBase gemDiamond

Recipe:

Diamond·Lv5Sapphire·Lv5Topaz·Lv5

Splash 70px, full damageSlow 20% for 2s

Single-round combo: Flawless Diamond + Flawless Sapphire + Flawless Topaz.

Miss Shrimp - GemTD special tower Miss Shrimp art and stats

Miss ShrimpTreasureAir and ground

Damage495Interval0.6sRange (on field)275pxBase gemEmerald

Recipe:

Emerald·Lv5Sapphire·Lv5Ruby·Lv5

20% chain lightning 250 ×6 jumps (×0.8 per jump)50% forked lightning 250 ×4 targets5% gloom (roots the target for 2s)

Single-round combo: Flawless Emerald + Flawless Sapphire + Flawless Ruby.

Burning Stone - GemTD special tower Burning Stone art and stats

Burning StoneTreasureAir and ground

Damage347Interval2sRange (on field)196pxBase gemRuby

Recipe:

Ruby·Lv5Ruby·Lv4Amethyst·Lv5Amethyst·Lv4

Burning aura 400/s/132px

Single-round combo: Flawless Ruby x2 + Flawless Amethyst x2 (4 gems). Burns for 400/sec.

EHOME Stone - GemTD special tower EHOME Stone art and stats

EHOME StoneTreasureAir and ground

Damage166Interval1sRange (on field)170pxBase gemOpal

Recipe:

Opal·Lv1Opal·Lv2Opal·Lv3Opal·Lv4Opal·Lv5

Nearby tower attack speed +100%/176px

Single-round combo: E1+E2+E3+E4+E5. Attack speed +100% aura.

Wings Stone - GemTD special tower Wings Stone art and stats

Wings StoneTreasureAir and ground

Damage376Interval0.8sRange (on field)170pxBase gemTopaz

Recipe:

Topaz·Lv1Topaz·Lv2Topaz·Lv3Topaz·Lv4Topaz·Lv5

Attacks apply 100% burning splash

Single-round combo: Y1~Y5. Every hit triggers a 100% burning splash.

Cullinan (Secret) - GemTD special tower Cullinan (Secret) art and stats

Cullinan (Secret)TreasureAir and ground

Damage1168Interval0.5sRange (on field)293pxBase gemDiamond

Recipe:

Diamond·Lv1Diamond·Lv2Diamond·Lv3Diamond·Lv4Diamond·Lv5

Poison 25/s for 8sNearby tower range +15True strike aura (nearby towers never miss, ignores evasion)

Single-round combo: D1~D5.

Fusion Stone - GemTD special tower Fusion Stone art and stats

Fusion StoneTreasureAir and ground

Damage1232Interval0.8sRange (on field)214pxBase gemOpal

Recipe:

Uranium 235Black Cat EyeParaiba Tourmaline

Damage aura +50%/850px

The pride of UG: nearby towers gain +50% attack damage (850px aura, stacks with Black Cat Eye).

3. Slab recipes (12 slabs)

Slabs are towers laid on the ground: a basic slab = the required main gem + one material gem of your choice (any of the 5 fresh gems from the current round or gems already on the field works); advanced slabs are combined from two matching basic slabs.

Poison Vine Slab - GemTD slab Poison Vine Slab art and stats

Poison Vine SlabBasicAir and ground

Damage35Interval0.5sRange (on field)82px

Materials:

Emerald·Lv3+Aquamarine·Lv2Opal·Lv2Topaz·Lv2(pick one)

Poison 10/s for 20sSlow 25% for 20s

Poison 10/sec for 20s plus 25% slow for 20s (Poison Vine slab, hits air).

Spell Slab - GemTD slab Spell Slab art and stats

Spell SlabBasicAir and ground

Damage79Interval0.5sRange (on field)83px

Materials:

Aquamarine·Lv3+Amethyst·Lv2Diamond·Lv2(pick one)

5% frost nova: 100 magic damage + 0% slow in 100px5% forked lightning 80 ×2 targets5% chain lightning 85 ×2 jumps (×0.8 per jump)5% forked lightning 125 ×1 targetsOn hit, armor -55% greed (bonus gold)

Stomp for 30 damage plus a six-spell pool at 5% each: Frost Star 100 / Blades 80 / Chain 85 / Carrion 125 / -5 armor / +3 gold (Rune Stone).

Opal Vein Slab - GemTD slab Opal Vein Slab art and stats

Opal Vein SlabBasicGround only

Damage115Interval0.5sRange (on field)87px

Materials:

Opal·Lv3+Ruby·Lv2Topaz·Lv2(pick one)

Nearby tower attack speed +10%/860px

Stomp for 80 damage, 860px range and a +10% attack speed aura (Opal Vein slab).

Slow Slab - GemTD slab Slow Slab art and stats

Slow SlabBasicGround only

Damage133Interval0.5sRange (on field)87px

Materials:

Sapphire·Lv3+Aquamarine·Lv2Diamond·Lv2Emerald·Lv2(pick one)

Slow 15% for 99999s

Stomp for 100 damage plus a permanent 15% slow (the slow never wears off).

Hold Slab - GemTD slab Hold Slab art and stats

Hold SlabBasicGround only

Damage196Interval2sRange (on field)84px

Materials:

Topaz·Lv3+Amethyst·Lv2Sapphire·Lv2(pick one)

100% stun for 1.5s

Always ensnares for 1.5s with 160 damage plus kill-level growth (kills x20), 2s cooldown. Chaos attack (Hold Slab).

Floating Slab - GemTD slab Floating Slab art and stats

Floating SlabBasicAir and ground

Damage87Interval0.5sRange (on field)214px

Materials:

Amethyst·Lv3+Emerald·Lv2Opal·Lv2Ruby·Lv2(pick one)

Stomp for 40 damage (ground) plus 850-range air missiles for 40 damage every 0.5s (Floating slab, Owl).

Damage Slab - GemTD slab Damage Slab art and stats

Damage SlabBasicGround only

Damage47Interval0.5sRange (on field)85px

Materials:

Diamond·Lv3+Sapphire·Lv2Opal·Lv2(pick one)

Burning aura 20/s/320pxDamage aura +10%/320px

Point-blank burn per second (kills x10 + wave x20, base 20) plus a 320px +10% damage aura (Damage slab).

AoE Slab - GemTD slab AoE Slab art and stats

AoE SlabBasicAir and ground

Damage46Interval0.5sRange (on field)170px

Materials:

Ruby·Lv3+Topaz·Lv2Amethyst·Lv2Ruby·Lv2(pick one)

Hits 20 targets at once

Hits every target in range (AoE slab, 600-range Avenger missile).

Ruins Slab - GemTD slab Ruins Slab art and stats

Ruins SlabAdvancedAir and ground

Damage214Interval0.33sRange (on field)84px

Materials:

Poison Vine SlabSpell Slab(two basic slabs)

5% frost nova: 300 magic damage + 0% slow in 120px5% forked lightning 150 ×2 targets5% forked lightning 150 ×2 targetsOn hit, armor -75% forked lightning 200 ×1 targets5% greed (bonus gold)5% chain lightning 200 ×2 jumps (×0.8 per jump)Poison 20/s for 2s

Stomp for 100 damage every 0.33s plus an eight-spell pool (Frost Star 300 / Quake / Blades / -7 armor / Shockwave / Gold drain / Forked lightning / Poison, grows with kill level).

Ancient Slab - GemTD slab Ancient Slab art and stats

Ancient SlabAdvancedAir and ground

Damage308Interval2.5sRange (on field)87px

Materials:

Hold SlabFloating Slab(two basic slabs)

100% stun for 2.5sOn hit, armor -12

Always ensnares for 2.5s (ground and air) with -12 armor while held; damage skyrockets with kills and waves (Ancient slab, 2.5s cooldown).

Ghost Slab - GemTD slab Ghost Slab art and stats

Ghost SlabAdvancedAir and ground

Damage448Interval0.3sRange (on field)87px

Materials:

Slow SlabOpal Vein Slab(two basic slabs)

emberstackNearby tower attack speed +10%/1230pxOn kill, bursts for 500 damage in 920px

Stomp for 200 damage every 0.3s, Ember Stack adds +35 per hit x combo (5s), a global +10% attack speed aura, and the target explodes for 500 in 750 on death (Ghost slab).

Viper Slab - GemTD slab Viper Slab art and stats

Viper SlabAdvancedAir and ground

Damage123Interval0.5sRange (on field)196px

Materials:

Damage SlabAoE Slab(two basic slabs)

Hits 20 targets at onceBurning aura 50/s/500pxDamage aura +10%/500px

750-range missiles hit all targets for 30 damage every 0.5s, a 500px burn of 50 up to 100/sec and a 500px +10% up to +60% damage aura (grows with kills) (Viper slab).

4. FAQ (Gem TD gameplay)

How does each round of Gem TD work?

Each round has three phases: in the build phase, long-press an empty spot on the map to place 5 stones, each randomly becoming one of 8 gem types and a maze wall; in the pick phase you keep only 1 of the 5 gems as a tower while the rest turn into stone blocks (still maze walls); in the attack phase creeps march along the checkpoints, and any creep that gets past your maze to the castle costs you lives.

How do gems combine and level up?

When 2 gems of the same type and level show up in a round you can merge them 2-into-1 into the next level; with 4 you can go 4-into-1 and jump 2 levels. Gems have 6 levels: Cracked → Flawed → Common → Flawless → Perfect → Giant. You can also spend gold to raise quality odds, so higher level gems show up more often each round.

How do special towers combine? What goes into a recipe?

Special towers combine by recipe: the 5 gems rolled this round plus towers already on the field all count as materials. For example Silver = Cracked Sapphire + Cracked Diamond + Cracked Topaz; advanced towers use basic towers as materials (Silver Knight = Silver + Flawed Aquamarine + Common Ruby). Combine as soon as the recipe is complete in the current round, and the kill counts of consumed towers add up on the new tower.

How does kill leveling work?

Every 10 kills levels a tower up once, +10% attack damage per level (damage only; range and attack speed stay the same). Kill counts carry over and add up when combining, so using veteran towers that have seen lots of action as materials gives the new tower a bigger head start.

How do slabs combine, and how are they different from special towers?

Slabs are towers laid flat on the ground: a basic slab = the required main gem + one material gem of your choice (for example Poison Vine Slab = Common Emerald + Flawed Aquamarine / Flawed Opal / Flawed Topaz, any one of them); the 5 fresh gems of the round or gem towers already on the field both work as materials. Advanced slabs combine from two matching basic slabs (Ruins Slab = Poison Vine Slab + Spell Slab). Slab kill levels cap at 11.

How do I deal with magic immune or physical immune creeps?

Magic attacks cannot hurt magic immune creeps, and physical attacks deal only 15% damage to physical immune ones; the chaos attacks of topaz gem towers and the Slow Slab ignore both kinds of reduction, so they are the core counter for double-immune waves.