Spirit onyx

A Spirit onyx is the only Summoning spirit gem that can only be obtained from Treasure Hunter. It gives a 60% chance to save a charm when it is worn while creating summoning pouches. It has 60 charges and loses a charge for every pouch it saves a charm for. When all the charges are consumed, it breaks.

Once equipped, it will become a spirit onyx (a) and not stack with other gems in the bank.

Trivia

 * Originally, the spirit onyx was used to store 20 uncharged summoning pouches; however, this was changed in response to player feedback. All gems obtained before the update can be converted to the current version of that gem.