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Synthetic opalized glass used in jewelry.
Also used for impure, colored variety of common opal.
Confusing and unnecessary designation, should be avoided.
(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
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Locality Updated: Reiersdal Pegmatite (Reiarsdal; Tjomsås), Øvrebø, Vennesla, Vest-Agder, NorwayFrom Alfredo Petrov, 19th Dec 2014 05:46:23