Prase

Like all chalcedonies, the silica of Prase forms by building up thin layers of quartz fibers. Its dark green translucent color comes from crystals of chlorite.

• Period: 1
  • Garnets Feldspars
  • Hardness: 6.5-7
• Group: Group VIIA?

See also Matter, Gems, Cl and Garnets Feldspars.

— Scotus - 20 Jan 2002