Hypersthene

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Physical & Optical Properties

Mohs Hardness 5,0 – 6,0
Specific Gravity 3,45 – 3,55
Refractive Index 1,673 – 1,731
Crystal System Orthorhombic
Cleavage Distinct
Color various
Birefringence 0,016
Pleochroism Green stones - strong: (dark) bluish-green - brownish-red - (yellowish)

Mohs Hardness

1 Talc 2 Gypsum 3 Calcite 4 Fluorite 5 Apatite 6 Orthoclase 7 Quartz 8 Topaz 9 Corundum 10 Diamond Hypersthene
Mohs hardness of Hypersthene shown against the ten reference minerals, from talc (1) to diamond (10).
Mohs Reference mineral Hypersthene
1 Talc
2 Gypsum
3 Calcite
4 Fluorite
5 Apatite
6 Orthoclase
7 Quartz
8 Topaz
9 Corundum
10 Diamond

Crystal System

a b c Orthorhombic a ≠ b ≠ c, α = β = γ = 90°

Value & Market

Price Tier Budget (< $50/ct)

About Hypersthene

Hypersthene is a magnesium iron silicate in the pyroxene group, notable for displaying a distinctive copper-red to bronze metallic sheen known as schiller—caused by thin-film interference from oriented iron oxide inclusions—giving it a quasi-metallic surface luster. It forms in mafic igneous and metamorphic rocks and is found in localities in Labrador (Canada), Norway, the USA, and Greenland. Cut as cabochons, hypersthene produces an unusual dark gemstone with a moving, flame-like bronzy schiller highly prized by collectors.

Science FYI Family

Frequently Asked Questions

What is Hypersthene?
Hypersthene is a magnesium iron silicate in the pyroxene group, notable for displaying a distinctive copper-red to bronze metallic sheen known as schiller—caused by thin-film interference from oriented iron oxide inclusions—giving it a quasi-metallic surface luster. It forms in mafic igneous and met
What is the hardness of Hypersthene?
Hypersthene has a Mohs hardness of 5.0 to 6.0, making it moderate for use in jewelry.
What color is Hypersthene?
Hypersthene is primarily Various.
How much does Hypersthene cost?
Hypersthene falls into the Budget (< $50/ct) price range. Prices vary based on color, clarity, cut, and origin.
What is the crystal system of Hypersthene?
Hypersthene belongs to the Orthorhombic crystal system.

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