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Greyish white
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 for gemological information about Hypersthene.

Classification of Hypersthene

Discredited URL:
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Physical Properties of Hypersthene

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

Optical Data of Hypersthene

Biaxial (-)
RI values:
nα = 1.669 - 1.755 nβ = 1.674 - 1.763 nγ = 1.680 - 1.773
Measured: 70° to 90°, Calculated: 86°
Max Birefringence:
δ = 0.011 - 0.018
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of Hypersthene

All elements listed in formula:

Other Names for Hypersthene

Name in Other Languages:

Other Information

Health Risks:
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

Localities for Hypersthene

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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