Gem Locks



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.

Trivia

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

History
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