Variscite
Montgomery Ranch
Fairfield, Utah
This specimen is 10cm in diameter
Variscite (Al,Fe)PO4.H2O
Phosphate; hydrated phosphate of aluminum and iron
Color and Luster: Pale green to emerald-green, also bluish green, colorless; vitreous, waxy; streak white
Hardness: 4-4.5
Cleavage: Good in one direction, poor in a second
Fracture: Uneven, splintery, conchoidal, brittle
Crystals: Orthorhombic; crystals are very rare, usually occur in fine grained masses, nodules, veinlets, or crusts
Photo by Lance Kearns
Descriptions taken from
The Audubon Society Field Guide to North American Rocks and Minerals