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Greyish white
Vitreous, Silky
5½ - 6
An unnecessary name for a 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


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

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.

Hypersthene in petrology

An essential component of (items highlighted in red)
Common component of (items highlighted in red)

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 URL:
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The following Hypersthene specimens are currently listed for sale on

Localities for Hypersthene

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