Hypersthene is an iron-rich pyroxene in the same series of minerals as enstatite and bronzite. It is distinguished by its reddish Iridescence, which is due to platy inclusions of goethite and hematite. Often too dark 10 facets, it may be cut en cabochon instead to show the sparkling inclusions. Bronzite, a greenish brown variety with a bronze-like luster, is also a collector's stone dark, slightly brittle, and not generally used in jewellery.

Most gem hypcrsthene is found in India, Norway, Greenland, Germany, and the USA. Bronzite is found in Austria.

Even through it is soft; howlite will withstand a polish, and is occasionally gypsum decorative stones.