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English: Helvite, Calcite (Var.: Manganoan Calcite), Quartz
Locality: Pachapaqui District, Bolognesi Province, Ancash Department, Peru (Locality at mindat.org)
From a onetime find in Peru in the early 90s, this is said to be one of the very best specimens (the other being a famous thumbnail in the Ralph Clark Collection). This specimen, from the Peruvian subcollection of Cal and Kerith Graeber, is an attractive miniature overall and features two SHARP, LEMON-YELLOW crystals of 4.5 to 6 mm on edge. The helvites are sharply tetrahedral in form, and they are so sharp and colorful they look fake. It is a supremely good rarity, and a classic form Peru that is almost unobtainable. 5 x 4 x 3 cm
Deutsch: Helvin, Calcit (Var.: Manganoan Calcit(?)), Quarz
Fundort: Distrikt Pachapaqui, Provinz Bolognesi, Ancash Department, Peru (Fundort bei mindat.org)
Date before March 2010(2010-03)
Source http://www.mindat.org/photo-64353.html


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