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Magnesite: Gemstone Information

Magnesite: Gemstone Information

Magnesite is MgCO3; crystals are rare, the common occurrence being as translucent, sometimes transparent colourless, white, yellowish to brown or grey masses with an earthy or chalky appearance. The crystal system is trigonal; there is one direction of perfect cleavage and the hardness is 3.5–4.5 with SG 3.0–3.1. The RI for the ordinary and extraordinary rays is 1.710 and 1.509, uniaxial negative with birefringence 0.202, very easy to see in the occasional faceted specimen. Under SWUV blue green or white fluorescence may be seen with greenish phosphorescence.Magnesite occurs as a primary mineral in igneous or sedimentary rocks or may be formed by the metamorphism or alteration of serpentine and peridotite. Fine crystals come from Brumado, Bahia, Brazil.

Products

  • Sillimanite Cats Eye 2.62ct 8.8x7.1x4.7mm Natural Gemstone India 3,275.00 2,620.00
  • Hessonite Garnet 10.18ct 14.79x11.76x6.43mm Natural Gemstone Ceylon 25,450.00 20,360.00
  • 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
  • Graphic Jasper Gemstone Graphic Jasper 16.51ct 27.11x17.26x5.06mm Natural Gemstone Indonesia 2,063.00 1,651.00
  • Coral 10.03ct 15.04x9.37x8.47mm Natural Gemstone Italy 25,075.00 20,060.00
  • Chrysoberyl 2.50ct 9.00x7.33x4.43mm Natural Gemstone India 13,000.00 12,500.00
  • Sillimanite 6.42ct 14.2x10x6.3mm Natural Rare Gemstone India 16,050.00 12,840.00
  • Star Ruby 8.18ct 11.09x9.34x7mm Natural Gemstone 7,668.00 6,135.00
  • Yellow Sapphire 1.72ct 7.89x5.65x3.63mm Natural Gemstone Ceylon 22,753.54 20,640.00

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