Species: Calcite var. Manganoan, Sphalerite, Pyrite

Locality: Pachapaqui District, Bolognesi Province, Ancash Department, Peru

Size: Large cabinet - 12 x 7 x 6 cm

Weight: 300 g

Number: 0572

 

Details: Here's an exceptionally fine, 2/3 pound cabinet manganocalcite that is equally beautiful as a crystal specimen or a fluorescent! Large, complex rhombohedral crystals have a pale pink color in white light, and crank out bright red-orange under all UV wavelengths, best under shortwave. The bottom side features a bunch of glossy black sphalerite crystals plus lots of tiny pyrites. The Pachapaqui District has been one of the best and most productive mineral localities in Peru for decades. 

NOTES ON ULTRAVIOLET:

The higher quality the UV source, the better fluorescent minerals look. Key factors include lamp wattage,  UV spectrum and filtration, as well as distance from lamp to specimen. For best results with any UV source, observe against a dark, non-fluorescent, non-reflective background, in complete darkness with eyes adapted. The photos here are taken using UV Systems SuperBright II (shortwave, midwave, longwave-350) and Philips BLB (longwave-370) lamps, metered and exposed to show fluorescent response to best advantage.  


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