Hypersthene gemstones have been found in the Adirondack Mountains of New York in the United States as well as Labrador and Quebec, Canada.

What does hypersthene meaning?

The name "hypersthene" comes from the Greek and means "over strength", and is an allusion to its being harder than the amphibole mineral hornblende (a mineral with which it is often confused). Hypersthene has been discredited by the International Mineralogical Association.

Is hypersthene a Pleochroic?

Hypersthene is sometimes pleochroic, showing light pink to light green colors. The chemical composition of hypersthene can be estimated using 2V (see p. 163 of DHZ).