Austinite is fairly rare but popular collection mineral. It forms in the oxidation zone of zinc ore deposits, often with the sometimes similar looking adamite. It can have a very nice color and silky or sub-adamantine (almost gem-like) luster. Fine specimens occur as radial clusters of intensely green crystals, and are much in demand.

Austinite is named after the mineralogist Austin F. Rogers.


  • Color is typically a bright green, but also colorless, white or pale yellow.
  • Luster is sub-adamantine or silky.
  • Transparency: Crystals are transparent to translucent.
  • Crystal System is orthorhombic; 2/m 2/m 2/m
  • Crystal Habits include acicular or bladed crystals in druses, radial aggregates or crusts, also fibrous.
  • Cleavage is perfect in one direction lengthwise.
  • Fracture is uneven.
  • Hardness is 4 - 4.5.
  • Specific Gravity is approximately 4.1 (heavy for translucent minerals)
  • Streak is white to pale green.
  • Associated Minerals are adamite, legrandite, limonite, smithsonite, aragonite and other oxidation zone minerals.
  • Notable Occurrences include Mapimi, Mexico; Tsumeb, Namibia and Toole Co., Utah, USA.
  • Best Field Indicators are crystal habit, cleavage, color, luster, density, lack of fluorescence and associations.

SF Writer
& Futurist

Stephen D. Covey

is Steve's pro-humanity, pro-space, pro-future blog, and a forum to discuss his talks at the International Space Development Conference (sponsored by the National Space Society).
See Steve's video interview about asteroid capture at
Part 1-Part 2-Part 3
You can make a difference!
Help President Obama, NASA, and the people of Earth. See the
Apophis Challenge
for solutions to:
- Global Warming
- Global Energy
- Man in Space
- Preventing the next Extinction Level Event


Copyright ©1995-2014 by Amethyst Galleries, Inc.
Site design & programming by web services