Image: <bdi><a href="https://www.wikidata.org/wiki/Q56247090" class="extiw" title="d:Q56247090"><span title="mineral collector and dealer">Robert M. Lavinsky</span></a></bdi> (CC BY-SA 3.0)
orthorhombicuncommonhydroxides
Diaspore
AlO(OH)
This specimen features brownish-pinkish, tabular to bladed crystals of diaspore, often exhibiting a vitreous luster and good crystal faces. Some crystals show a slight translucency.
Diaspore Physical Properties
Mohs Hardness
6.5Crystal System
orthorhombicLuster
vitreousStreak Color
whiteCleavage
perfect on {010}, good on {110}, distinct on {100}Fracture
conchoidalSpecific Gravity
3.35Colors
brown, pink, yellow, white, gray, violet, greenTransparency
transparentType Locality
Mugla Province, Aegean Region, TurkeyMineral Group
hydroxidesUses
gemstone, collector, minor aluminum oreAssociated Minerals
margarite, corundum, chloritoid, gibbsite, boehmiteRarity
uncommonGeological Context
Diaspore typically forms in bauxite deposits, emery deposits (metamorphosed bauxite), and hydrothermal alteration zones of aluminum-rich rocks. It is a product of the alteration of aluminum silicates.
