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Zunyite, Big Bertha Mine, La Paz County, Arizona

26.1.2020

Named after its type locality, the Zuni mine in San Juan County, Colorado, zunyite is an uncommon aluminum sorosilicate mineral that shows a soft, cherry red fluorescent response under short wave UV.  The specimen shown here features hundreds of small fluorescent zunyite crystals in a matrix of mostly non-fluorescent quartz.  This example is from a classic location for this material- the Big Bertha mine in La Paz County, Arizona.  This size of this specimen is 67 x 30 x 27 mm and it weighs 52 grams.

Small octahedral crystals of zunyite show a rich, soft red fluorescent response under short wave UV (254 nm).

 

Same specimen shown under visible light.  Small tan colored octahedral crystals of zunyite in a light/white matrix of milky quartz.

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