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Colour:Greyish whiteHardness:5½ - 6

Unnecessary name for member of Enstatite-Ferrosilite series; name discredited by the CNMMN Pyroxene Subcommittee (1988).
Regarded as a synonym of Enstatite or Ferrosilite, but commonly regarded as a mid-way member between these two end-members. Most "Hypersthene" is ferroan enstatite.

Visit gemdat.org for gemological information about Hypersthene. Currently in public beta-test.

Classification of Hypersthene

IMA status:Discredited
mindat.org URL:http://www.mindat.org/min-1995.html
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Physical Properties of Hypersthene

Lustre:Vitreous, Silky
Colour:Greyish white
Streak:Greyish white greenish
Hardness (Mohs):5½ - 6

Optical Data of Hypersthene

Type:Biaxial (-)
RI values: nα = 1.669 - 1.755 nβ = 1.674 - 1.763 nγ = 1.680 - 1.773
2V:Measured: 70° to 90°, Calculated: 86°
Maximum Birefringence:δ = 0.011 - 0.018

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High

Chemical Properties of Hypersthene

Simplified for copy/paste:(Mg,Fe)SiO3
Essential elements:Mg, O, Si
All elements listed in formula:Fe, Mg, O, Si

Other Names for Hypersthene

Ferroan EnstatiteFicinite (of Kenngott)GermariteHyperiteLabrador Hornblende
Other Languages:
Simplified Chinese:紫苏辉石

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Hypersthene

Reference List:

- +
Klaproth, M.H. (1810): Chemische Untersuchung des Hypersthens, Beiträge zur chemischen Kenntniss der Mineralkörper, Fünfter Band, Rottmann Berlin, 37-40

Mineralogical Magazine 52 (1988), 535.

Internet Links for Hypersthene

Search Engines:
  • Look for Hypersthene on Google
  • Look for Hypersthene images on Google
  • Mineral Dealers:
  • Lapis Mineral Magazin
  • Search for Hypersthene on Well-Arranged Molecules
  • Buy rare minerals from Excalibur Minerals
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • rare and unusual minerals mainly crystallized
  • Buy from David K Joyce minerals
  • Rare and Unusual minerals at Mineralogical Research Company
  • Fine Minerals from Weinrich Minerals, Inc.
  • The Arkenstone - Fine Minerals
  • Fine minerals from bisbeeborn.com
  • Find Hypersthene on www.crystalclassics.co.uk
  • Fine and rare minerals from mintreasure.com
  • Localities for Hypersthene

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