Mexican Contraluz Opal Cut Polished Slice Queretaro Mexico 4cm 14. 7gr




Item History & Price

Information:
Reference Number: Avaluer:4264121Country/Region of Manufacture: Mexico
Original Description:
Mexican Contraluz Opal - Polished cut sliceCarbonera Mine, La Trinidad, Tequisquiapan, Queretaro, MexicoSize :4 x 3.3 x 0.85 cm        Weight : 14.7 gramsVery rare, contraluz opals are usually found in Mexico but have also been found in Australia. These transparent opals show a play of color in both transmitted and reflected light.Photo and colours are visible when the opal is backlit
****************************Cut and polished end piece of clear  opal... with pale red hematite included quartz crystals and other unidentified inclusions. 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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