On the Auction House, you can find an alchemist named Kiras Gelsey.

This NPC can combine some crystals with the essence of Corvus to obtain some crystals to obtain new gems.

Currently, there are few active recipes for creating crystals.

Flash lapis I (STR/INT/WIS) (random):

Sonic lapis I (STR/INT/WIS) (random):

Flash lapis II (STR/INT/WIS) (depends of lapis):

Sonic lapis II (STR/INT/WIS) (depends of lapis):