A truly attractive thumbnail with turquoise Devillina crystals up to 2-3 mm in size, richly scattered throughout the matrix. This specimen comes from the collection of Dr. Francesco Bedognè, no. 1715, and was published in the encyclopedia "Collezionare Minerali - Hobby & Work, 1996," issue 25, page 396. Original label available.
Formula :
CaCu4[(OH)6/(SO4)2] * 3 H2O
System: monoclinic Hardness:2½ Rarity:not common
Strunz id:VI/D.19-10 -
SULFATES, CHROMATES, MOLYBDATES and TUNGSTATES
Name origin: Named in 1872 by Félix Pisani in honor of Henri Étienne Sainte-Claire Deville [March 11, 1818 Saint Thomas, Virgin Islands - July 1, 1881 Boulogne, Hauts-de-Seine, Ile-de-France, France], French chemist. He was professor of chemistry at the University of Besançon from 1845 - 1851. In 1851-1859, he was professor of chemistry at École Normale Supérieure in Paris. He became professor of chemistry at the Sorbonne in 1859 - 1881. Deville discovered the first economical process to refine aluminum.
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 Specimen weight:4 gr.
 Crystal size:Up to 2-3 mm
 Overall size: 25mm x 18 mm x 11 mm
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