Gem Locks

    

PC/Console/Mobile/tModLoader/tModLoader 1.3-Legacy-Only Content: This information applies only to the PC, Console, Mobile, tModLoader, and tModLoader Legacy versions of Terraria.

Gem Locks

• 

  

Statistics

Type	Mechanism
Placeable	✔️ (3 wide × 3 high)
Use time	10 (Very fast)
Rarity	00*
Sell	1

• Internal Tile ID: 440

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.

Gem Locks are primarily used in the making of adventure maps, where the player must complete some objective to be rewarded with the gem required to continue.

Crafting

Recipes

Result	Ingredients	Crafting station
Amber Gem Lock Internal Item ID: 3650	Amber5 Stone Block10	Heavy Work Bench
Amethyst Gem Lock Internal Item ID: 3648	Amethyst5 Stone Block10
Diamond Gem Lock Internal Item ID: 3649	Diamond5 Stone Block10
Emerald Gem Lock Internal Item ID: 3646	Emerald5 Stone Block10
Ruby Gem Lock Internal Item ID: 3644	Ruby5 Stone Block10
Sapphire Gem Lock Internal Item ID: 3645	Sapphire5 Stone Block10
Topaz Gem Lock Internal Item ID: 3647	Topaz5 Stone Block10

Notes

• 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, despite the ingredients being worth more.

Trivia

• The Gem Lock was a suggestion by Master Geass, a user on the Official Terraria Forums.

History

 PC version

• Desktop 1.3.1: Introduced.

 Console version

• Console 1.0.1372.5: Introduced.

 Nintendo Switch version

• Switch 1.0.895.9: Introduced.

 Mobile version

• Mobile 1.4.0.5.0: Introduced.