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Prosopite: Gemstone Information

Prosopite is CaAl2(F,OH)8 and forms transparent small tabular colourless crystals of the monoclinic system. Crystals may become translucent on exposure and have one direction of perfect cleavage. The hardness is 4.5 and the SG 2.88–2.89. The RI for the alpha, beta and gamma rays is 1.500–1.501, 1.503–1.509, 1.509–1.510, biaxial positive with birefringence 0.009. Prosopite occurs in granite pegmatites, sometimes in base metal deposits or fluorine-rich granites and greisens. Prosopite from the Santa Rosa mine, Mazapil, Zacatecas, Mexico, occurs with azurite and can resemble turquoise though its higher RI adequately separates the two materials.

Products

  • Pink Sapphire 1.13ct 6.54x4.94x3.84mm Natural Gemstone Ceylon 14,102.40 13,560.00
  • Coral 5.12ct 11.65x11.41x6.28mm Natural Gemstone Italy 9,600.00 7,680.00
  • Emerald 0.30ct 5.91x3.91x2.00mm Natural Gemstone Zambia 8,268.00 7,500.00
  • Blue Sapphire 1.12ct 6.36x5.64x3.87mm Natural Gemstone Ceylon 13,982.98 13,440.00
  • Tsavorite Garnet 1.00ct 6.61x4.93x3.86mm Natural Gemstone Tanzania 26,000.00 25,000.00
  • Tanzanite 8.01ct 13.3x10.2x7.1mm Natural Gemstone Tanzania 10,012.00 8,010.00
  • Ruby 1.08ct 7.44x4.64x3.34mm Natural Gemstone Burma 21,465.00 19,200.00
  • Padparadscha Sapphire 0.56ct 5.45x4.62x2.19mm Natural Gemstone Ceylon 17,500.00 14,000.00
  • Hessonite Garnet 10.18ct 14.79x11.76x6.43mm Natural Gemstone Ceylon 25,450.00 20,360.00
  • Yellow Sapphire 1.72ct 7.89x5.65x3.63mm Natural Gemstone Ceylon 22,753.54 20,640.00

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