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Sapphirine: Gemstone Information

Sapphirine is (Al,Mg)8(Al,Si)6O20 (several polytypes are recognized) and forms indistinct tabular transparent to translucent light to dark blue crystals of the monoclinic or triclinic system. The hardness is 7.5 and the SG 3.4–3.5. The RI for the alpha, beta and gamma rays is 1.701–1.726,1.703–1.728, 1.705–1.734, biaxial positive or negative, birefringence 0.006.Pleochroism is strong with a variety of shades of blue, also pale reddish or yellowish green. Sapphirine occurs in high-temperature rocks or xenoliths with abundant aluminium and magnesium and low silicon. Sakena,Vorokafotra, Bekily, Anjamiary and Betroka, Madagascar have provided crystals. GIA have reported a purplish pink Sri Lankan faceted stone of 1.54 ct with mica inclusions. An orange-red variety has been reported from Tanzania.

Products

  • Graphic Jasper 17.88ct 27.82x16.44x5.30mm Natural Gemstone Indonesia 2,235.00 1,788.00
  • Amethyst 9.38ct 16x12x8.2mm Natural Gemstone 2,931.00 2,345.00
  • Chrysoberyl Cats Eye 1.34ct 5.73x5.62x4.29mm Natural Gemstone India 17,440.80 16,758.00
  • Tanzanite 8.01ct 13.3x10.2x7.1mm Natural Gemstone Tanzania 10,012.00 8,010.00
  • Opal 2.66ct 10.8x9.2x5.8mm Natural Gemstone Ethiopia 6,650.00 5,320.00
  • Sunstone 3.21ct 10.6x7.8x5.1mm Natural Gemstone India 3,009.00 2,407.00
  • Coral 5.12ct 11.65x11.41x6.28mm Natural Gemstone Italy 9,600.00 7,680.00
  • Pink Sapphire 1.13ct 6.54x4.94x3.84mm Natural Gemstone Ceylon 14,102.40 13,560.00
  • Emerald 0.30ct 5.91x3.91x2.00mm Natural Gemstone Zambia 8,268.00 7,500.00
  • Cats Eye Moonstone 8.63ct 16.4x12.1x6mm Natural Gemstone India 8,090.00 6,472.00

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