Quartz belongs to the Rocks category of items found in Spiritfarer. It can used to make Silica Powder at a Crusher.
Quartz is mined from one of the Quartz Dragons or from one of the Turtle sisters.
The Quartz Dragons are located at [-24, 65] and [-172, 45] in the Furogawa Region.
Quartz can be used to make Silica Powder in the Crusher.
If Stella has the Improved Tools Ability, Mining a Quartz rock may 1 Citrine during the Quartz Dragon Event and will 1 Citrine if mined on one of the Turtle sisters