Purple Aragonite Specimen from Minglanilla, Spain DX3504 optical calcite These green onyx goblets have

These green onyx goblets have been carved to highlight the wonderful banding that Pakistani onyx is known for

in which the ancient resin is slowly transformed into amber over millions of years

Though the pearly greens may make it seem easy to spot in a crowd

Trolleite Moon on Metal Stand

Purple Aragonite Specimen from Minglanilla, Spain DX3504 optical calcite These green onyx goblets haveThis Spanish aragonite specimen has a lovely purple color in the center of the crystals and fades abruptly to an opaque white at the ends. It is fluorescent, and phosphorescent, under a long wave UV light (shown in the last photo). Aragonite is a mineral that belongs to the carbonate group, and it's known for its distinct crystal structure and beautiful array of colors. Chemically, it's composed of calcium carbonate (CaCO), the same compound found in