Gem Lock

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Gem Lock
  • Amethyst Gem Lock.png Topaz Gem Lock.png Sapphire Gem Lock.png

    Emerald Gem Lock.png Ruby Gem Lock.png Diamond Gem Lock.png Amber Gem Lock.png
Stack digit 9.pngStack digit 9.png
Dimensions3 wide × 3 high
Use time14 Very Fast
RarityRarity Level: 0
SellSilver Coin
Desktop version Desktop-Only Content: This information applies only to the Desktop version of Terraria.
Placed Gem Locks, in both their on and off states.

A Gem Lock is a special mechanism which acts as a container or altar for a Large Gem. A Gem Lock will emit an activation signal if the corresponding Large Gem is placed inside it and once again if it gets removed. This allows for a simple contraption that uses only one mechanism to keep something like a door open as long as the gem is inside the lock because if it gets taken out it will immediately close.

Crafting[edit | edit source]

Recipes[edit | edit source]

ResultIngredientsCrafting station
Amethyst Gem Lock.pngAmethyst Gem Lock
Internal Item ID: 3648
Heavy Work Bench.pngHeavy Work BenchDesktop VersionConsole VersionOld-gen console versionMobile Version
Topaz Gem Lock.pngTopaz Gem Lock
Internal Item ID: 3647
Sapphire Gem Lock.pngSapphire Gem Lock
Internal Item ID: 3645
Emerald Gem Lock.pngEmerald Gem Lock
Internal Item ID: 3646
Ruby Gem Lock.pngRuby Gem Lock
Internal Item ID: 3644
Diamond Gem Lock.pngDiamond Gem Lock
Internal Item ID: 3649
Amber Gem Lock.pngAmber Gem Lock
Internal Item ID: 3650

Notes[edit | edit source]

  • The Gem Lock is the only craftable mechanism that emits a signal, while not having wire in the recipe.
  • Painting the Gem Lock will also affect the color of the gem placed inside it.
  • The Gem Lock only sells for 1 Silver Coin, despite the ingredients being worth more.

Trivia[edit | edit source]

History[edit | edit source]

Tools Wire • Wrenches • Wire Cutter • Multicolor WrenchDesktop Version • The Grand DesignDesktop Version • Actuation RodDesktop Version
Accessories Mechanical LensDesktop Version • PresseratorDesktop Version
Triggers Lever • Switch • Pressure Plates • Timers • DetonatorsDesktop VersionConsole Version • Trapped ChestsDesktop Version • Gem LocksDesktop Version
Devices Active/Inactive Stone Block • Actuator • Announcement BoxDesktop Version • Pumps • Teleporter • Functional Statues • Light sources • Gemspark BlocksDesktop VersionConsole VersionOld-gen console versionMobile Version
Traps Dart • Super Dart • Spear • Spiky Ball • Flame • Explosives • GeyserDesktop Version
Furniture: Iron Anvil.png Crafting Stations • Candle.png Light Sources • Chest.png Storage Items • Pure Water Fountain.png Other Items

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