Gems and Jewels
From MoronYard Wiki
Gems and Jewels are socketable items, meaning they can be inserted into other items with sockets. By adding a gem or jewel to a socketed item, their attributes are transferred to the socketed item. The gem or jewel will be destroyed in the process and 1 socket will be removed from the socketed item.
Ancient Gems
Ancient gems can only be found if the player is wearing an item with the attribute "Ability to find Ancient Gems". Ancient gems come in 4 different tiers: Flawed, Normal, Flawless and Perfect.