Quartz

Quartz is a gem tradeskill material and is used by architects, armorers, and weaponsmiths.

Source
Quartz is obtained through salvaging and from Iron Nodes with the mining tradeskill and can be found in Algoroc, Celestion, Deradune, and Ellevar. This crystal can also be obtained from a Tier 1 Mineral Deposit.

Schematics
Quartz is used in the following schematics: