Hemimorphite, Flat Rectangle Bead Drop/Dangle Earrings | 1 1/4" Long | Blue |Natural, Untreated Hemimorphite Blue Rectangular Bead Sterling Silver Drop Dangle Earrings. These faceted blue Hemimorphite bead earrings add sparkle to your wardrobe or make a wonderful gift, They are beautifully cut to catch the light from every direction. In the early 19th century, the British mineralogist James Smithson discovered that the zinc ore then known as calamine was composed of hemimorphite and smithsonite. These minerals, along with