Gem Tower Defence - Basic Gems

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Gem Tower Defence, as in the original Flash game, features eight basic gems, all of which are available in six tiers. This page presents the specification of each gem.

The gems' graphics are shown in PNG format in the tables below; be aware that the game uses scalable (SVG) versions of these images.

Note 1: Range is counted in grid tiles. One tile equals 13 px of the original game's count.

Note 2: Cooldown is counted in game ticks. The game is set to run at 40 ticks per second, therefore 1 tick = 25 ms.

Amethyst

 GradeDamageCooldownRangeDescription
Chipped AmethystChipped9 - 133211.0Attacks air only.
Flawed AmethystFlawed18 - 254012.375Attacks air only.
Normal AmethystNormal30 - 404013.75Attacks air only.
Flawless AmethystFlawless60 - 754014.3Attacks air only.
Perfect AmethystPerfect140 - 1504016.5Attacks air only.
Great AmethystGreat350 - 4004018.15Attacks air only.

Aquamarine

 GradeDamageCooldownRangeDescription
Chipped AquamarineChipped6 - 8203.85Fast attack speed.
Flawed AquamarineFlawed12 - 15204.015Fast attack speed.
Normal AquamarineNormal24 - 30204.18Fast attack speed.
Flawless AquamarineFlawless48 - 55204.4Fast attack speed.
Perfect AquamarinePerfect100 - 120206.05Fast attack speed.
Great AquamarineGreat280 - 280206.6Fast attack speed.

Diamond

 GradeDamageCooldownRangeDescription
Chipped DiamondChipped8 - 12325.5Attacks ground only and has 25% chance to deal 2× damage.
Flawed DiamondFlawed16 - 18406.05Attacks ground only and has 25% chance to deal 2× damage.
Normal DiamondNormal30 - 37406.6Attacks ground only and has 25% chance to deal 2× damage.
Flawless DiamondFlawless58 - 65407.15Attacks ground only and has 25% chance to deal 2× damage.
Perfect DiamondPerfect140 - 150408.25Attacks ground only and has 25% chance to deal 2× damage.
Great DiamondGreat300 - 350409.35Attacks ground only and has 25% chance to deal 5× damage.

Emerald

 GradeDamageCooldownRangeDescription
Chipped EmeraldChipped4 - 7325.5Deals a poison attack that does 2 damage per second, and slows the target enemy's movement by 15%. Lasts 3 seconds.
Flawed EmeraldFlawed10 - 13406.05Deals a poison attack that does 3 damage per second, and slows the target enemy's movement by 20%. Lasts 4 seconds.
Normal EmeraldNormal15 - 25406.6Deals a poison attack that does 5 damage per second, and slows the target enemy's movement by 25%. Lasts 5 seconds.
Flawless EmeraldFlawless30 - 38407.7Deals a poison attack that does 8 damage per second, and slows the target enemy's movement by 30%. Lasts 6 seconds.
Perfect EmeraldPerfect80 - 90409.9Deals a poison attack that does 16 damage per second, and slows the target enemy's movement by 50%. Lasts 8 seconds.
Great EmeraldGreat250 - 250409.9Deals a poison attack that does 50 damage per second, and slows the target enemy's movement by 50%. Lasts 30 seconds.

Opal

 GradeDamageCooldownRangeDescription
Chipped OpalChipped5 - 5326.6Gives an aura to other gems within 6.6 range which increases their attack speeds by 10%.
Flawed OpalFlawed10 - 10407.7Gives an aura to other gems within 7.7 range which increases their attack speeds by 15%.
Normal OpalNormal20 - 20408.8Gives an aura to other gems within 8.8 range which increases their attack speeds by 20%.
Flawless OpalFlawless40 - 40409.9Gives an aura to other gems within 9.9 range which increases their attack speeds by 25%.
Perrfect OpalPerfect85 - 854011.0Gives an aura to other gems within 11.0 range which increases their attack speeds by 35%.
Great OpalGreat180 - 1804016.5Gives an aura to other gems within 16.5 range which increases their attack speeds by 50%.

Ruby

 GradeDamageCooldownRangeDescription
Chipped RubyChipped8 - 9408.8Attacks cause splash damage.
Flawed RubyFlawed13 - 16408.8Attacks cause splash damage.
Normal RubyNormal20 - 25408.8Attacks cause splash damage.
Flawless  RubyFlawless38 - 45408.8Attacks cause splash damage.
Perfect RubyPerfect80 - 104409.9Attacks cause splash damage.
Great RubyGreat140 - 140209.9Attacks cause splash damage. Attacks up to three targets.

Sapphire

 GradeDamageCooldownRangeDescription
Chipped SapphireChipped5 - 8325.5Attacks will slow target's movement speed by 20% for 5 seconds.
Flawed SapphireFlawed10 - 13408.25Attacks will slow target's movement speed by 20% for 5 seconds.
Normal SapphireNormal16 - 21408.8Attacks will slow target's movement speed by 20% for 5 seconds.
Flawless SapphireFlawless30 - 40409.35Attacks will slow target's movement speed by 20% for 5 seconds.
Perfect SapphirePerfect60 - 754015.4Attacks will slow target's movement speed by 20% for 5 seconds.
Great SapphireGreat200 - 2004022.0Attacks will slow target's movement speed by 20% for 5 seconds.

Topaz

 GradeDamageCooldownRangeDescription
Chipped TopazChipped4 - 4325.5Attacks up to three targets.
Flawed TopazFlawed8 - 8405.5Attacks up to three targets.
Normal TopazNormal14 - 14405.5Attacks up to four targets.
Flawless TopazFlawless25 - 25405.5Attacks up to four targets.
Perfect TopazPerfect75 - 75406.6Attacks up to five targets.
Great TopazGreat250 - 250407.7

Attacks up to seven targets.