Inscribed Gem

Inscribed Gems give items a counter to track a variety of in-game stats. Adding an Inscribed Gem to an item will display the tracked stats in the item's description, and change the item's Quality to Inscribed. Stat tracking counters on Inscribed Gems can be reset in the socketing UI.

Universal Gems
These gems track stats that can be counted on all heroes.

Hero-specific Gems
These gems can only track skill-based stats used by certain heroes.

Unreleased Gems
Some gems have been found in string tables, but have not been officially released yet.

History
Inscribed was formerly known as Strange. This was changed with the November 14, 2013 Patch.
 * All Strange Modifiers were converted into Gem Packs.
 * Gem Packs contain a corresponding gem and an Artificer's Chisel for creating a socket.
 * All Strange quality items were automatically socketed with the corresponding Inscribed gem.