Wollastonite and Calcite - White Knob Quarry, Lucerne Valley, San Bernardino Co., California, USA


The White Knob Quarry is operated by Omya, mining white calcium carbonate.  Mainly a marble and limestone quarry, much of the gangue ore is tossed aside and, luckily for us, nicely fluorescent.  These include the primary (nicest) fluorescent species - wollastonite (bright yellow SW) that has metamorphasized from the limestone.   Others include calcite (dull orange, manganese), green hyalite opal, bluish diopside, a white dolomite, and several other unidentified minerals.  Mn, U Zn, Fe, and REE's all probably act as activators.  With careful prospecting some spectacular multi-color specimens can be found.


 Wollastonite and Calcite - Shortwave UV





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