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catalog Crystals Geodes and druses

Staurotid of Brittany on ganges - France - 210605540

This product has been sold or is no longer available.

Contractual photos showing the object you will receive when ordering. The photos were taken in order to obtain the most faithful possible rendering of the object.

390

grams

SOLD

Reference
210605540

Size mm
90x80x50

Category
Geodes and druses

Country
France

Mineral
Staurolite

Collection
217 - April 2021

Translate to :

STAUROLITE

Staurolite or staurolite is a mineral species from the silicate group and the nesosubsilicate subgroup, with the formula (Fe,Mg,Zn,Co)1,5-2Al9(SiO4)4O6(O,OH)2 with traces of Ti, Cr, Mn, Co and Li. It crystallizes in the monoclinic crystal system.

Characteristics :

Density	3.65
Hardness	7.00 à 7.50
Group	Nésosilicate (Silicate)
Formula	Fe²⁺₂Al₉Si₄O₂₃(OH)
Cleavage	{010} distinct
Break	Irrégulière, Conchoïdale, Esquilleuse

Chemical composition :

O	Oxygen	Other no metal	47.3%
Al	Aluminum	Poor metal	28.91%
Si	Silicon	Metalloids	13.49%
Fe	Iron	Transition metal	9.63%
Mg	Magnesium	Alkaline earth metal	0.3%
H	Hydrogen	Other no metal	0.28%
Li	Lithium	Alkali metal	0.09%
			100.01%

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