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Graeserite - Buca della Vena Mine, Pontestazzemese, Stazzema, Lucca Province, Tuscany, Italy
(#:MINS8998)
Extremely rare Graeserite xls up to 1.5 mm on matrix.
Formula :
Fe
3+
4Ti
3
As
3+
O
13
(OH)
System:
monoclinic
Hardness:
5½
Rarity:
extremely rare
Strunz id:IV - OXIDES and HYDROXIDES
Name origin:
Named in 1998 by M. S. Krzemnicki and E. Reusser in honor of Dr. Stefan Graeser (1935-), professor at the Mineralogical-Petrographic Institute, University of Basel, Switzerland in recognition of his extensive research on the oxides and sulfosalts of arsenic in the Binntal region of Switzerland.
Specimen weight:74 gr.
Crystal size:Up to 1.5 mm
Overall size: 33mm x 30 mm x 26 mm
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