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Kyanite with Staurolite - Sponda Alp - Pizzo Forno, Chironico Valley, Faido, Leventina, Ticino, Switzerland
(#:MINS8774)
Specimen with an intense blue Kyanite xl 4,9 cm long on schist contrasting matrix with a brown well defined Staurolite xl in association.Showy and highly representative example of the species and locale.
Formula :
Al
2
[O/SiO
4
]
System:
triclinic
Hardness:
4-7½
Rarity:
not common
Strunz id:VIII/B.2-40 - SILICATES
Name origin:
Named in 1789 by Abraham Gottlieb Werner from the Greek word "kyanos", meaning "blue," the common color of the species. The French spelling, "Cyanite", was commonly used by mineralogists through much of the 19th and early 20th centuries.
Specimen weight:110 gr.
Crystal size:4,9 cm long
Overall size: 72mm x 30 mm x 48 mm
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