© Brian Kosnar - Mineral Classics
Hypersthene is named after Greek word for "over strength", alluding to its greater hardness than hornblende
, a mineral with which it is often confused.
Well-developed crystals are rare, the mineral is usually found as foliated masses.
Colour is brown, green or grey and the luster is vitreous to pearly. Hypersthene displays a brilliant copper-red metallic sheen or schiller on certain surfaces.
|Chemical Formula||Gemmological Tables (2004) , |
|Photos of natural/un-cut material from mindat.org|
|Physical Properties of Hypersthene|
|Mohs Hardness||5 to 6Gemstones of the world (2001) , More from other references|
|Specific Gravity||3.45 to 3.55Blue Chart Gem Identification (2010) , More from other references|
|Cleavage Quality||DistinctGemmological Tables (2004) , |
|Optical Properties of Hypersthene|
|Refractive Index||1.673 to 1.731Blue Chart Gem Identification (2010) , More from other references|
|Optical Character||Biaxial/-Blue Chart Gem Identification (2010) , |
|Birefringence||0.016Blue Chart Gem Identification (2010) , More from other references|
|Pleochroism||Green stones - strong: (dark) bluish-green - brownish-red - (yellowish)Blue Chart Gem Identification (2010) , |
|Colour (General)||Black, black-brown, black-greenGemmological Tables (2004) , |
|Transparency||Transparent,Translucent,OpaqueGemstones of the world (2001) , More from other references|
|Crystallography of Hypersthene|
|Crystal System||OrthorhombicBlue Chart Gem Identification (2010) , |
|Inclusions in Hypersthene|
|Tabular inclusions of hematite and goethite - Blue Chart Gem Identification, Herve Nicolas Lazzarelli, 2010, p 4|
|Mineral information:||Hypersthene information at mindat.org|