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Ossidiana nera naturale Obelisco, Messico- 543.29 g
N. 78329745
N. 78329745
1 - Natural Mexican Fire Opal matrix Cabochon with Inclusions
Queretaro, Mexico
Size : 11 x 9.7 x 5.3 mm - Weight : 3.65 carat
2 - Natural Mexican Fire Opal matrix Cabochon with Inclusions
Queretaro, Mexico
Size : 12.6 x 10 x 6 mm - Weight : 4.95 carat
2 cabochons total weight : 8.6 carat
Fire Opal is a variety of opal that has a bright yellow, bright orange or/ and bright red background colour.The colour itself comes from fine traces of iron oxide. The Mayas and Aztecs loved this gemstone and liked to use it in mosaics and for ritualistic purposes.
The inclusions found in opals from this locality reflect their volcanic provenance. Mexican opal often has inclusions of goethite-like needles, sometimes wrapped in limonite.Hematite crystals and botryoidal inclusions of white chalcedony. Various inclusions have been identified in Fire Opal - Goethite, Hematite, Fluorite, Hornblende, Rutile , Pyrite, Kaolinite , Cristobalite, Quartz, three-phase inclusion, two-phase inclusion, flow structures, and multiple cycles of growth have also been described.
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