Hypersthene is an orthopyroxene with a hidden light: bronze to silver schiller flashing across near-black bodies, like moonlight on wet slate. Canada and Madagascar supply most lapidary material; hardness 5.5–6.Each hypersthene at GEMIC Institute is natural, certified by our gemologists and photographed exactly as offered — the schiller you see is the stone you receive. Unique pieces; tracked worldwide delivery, 30-day inspection.