Andesine Beads
Natural-colored Cu-bearing plagioclase feldspar (andesine) is mined in Inner Mongolia. The gem-quality feldspar is derived from Quaternary-Tertiary volcano-sediments related to Jurassic-Cretaceous volcanic rocks. Most of the crystals have an orangy red color, and a few have red and green zones. Natural copper-bearing andesine is an unusual gem that is prized for its color and rarity. There has been widespread suspicion that the Chinese red andesine is diffusion-treated. After much investigation of the mines in Tibet and Inner Mongolia, the authenticity of the andesine was confirmed.
7x6-15x10mm Andesine Plain Nugget Beads 16 inch 40 pieces
8x7-10x7mm Andesine Plain Pear Beads 8 inch 48 pieces
8x6-10x7mm Andesine Top Drilled Faceted Rectangle Beads 8 inch 28 pieces
3mm Shaded Andesine Faceted Rondelle Beads 12.5 inch 178 pieces
5x3-12x10mm Andesine plain nuggets 18 inches 39 pieces
5x4-15x8mm Dark Andesine plain nuggets 18 inches 48 pieces
3.5-5.5mm Andesine plain rondelle beads 18 inch 185 pieces 1mm large hole A
7-10mm Andesine faceted rondelle beads 18 inch 94 pieces AA
2.5-5mm Andesine Faceted Rondelle Beads 18 inch 210 pieces
6.5-9mm Andesine Faceted Rondelle Beads 18 inch 96 pieces
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