Hypersthene (variety Bronzite) Slabs
Bronzite is the iron rich form of hypersthene
with a Moh's hardness of 5 to 6. It contains chatoyant bronze-colored spangles
and metallic areas that make it a very interesting and unique stone. Some people
call bronzite a poor man's pietersite, but it is a fine material in its own right.
Because of the varying hardness of the crystaline formations and metallic areas,
bronzite can be a challenge to cut. It must be sanded with fine grits to avoid
tearout and care must be taken to avoid undercutting. The careful cutter will
be rewarded with unusual and beautiful cabochons. Bronzite polishes with tin oxide
Example of Bronzite Cabochon
Close-up of bronzite's spangled chatoyant effect.