Chrysoprase. This is a gemstone variety of chalcedony. Specimen from New Caledonia, measuring approximately x 5 centimetres.

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Keywords: background, black, caledonia, chalcedony, chrysoprase, cryptocrystalline, dioxide, gem, gemstone, geological, geology, gepgraphy, green, mineral, mineralogy, nickel, quartz, silica, silicon, specimen, stone