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Danalite with amazonite

#41101

Danalite with amazonite

#41101
Availability
Sold
Size
4 x 2 x 2 cm - Miniature 
Formula
Be3Fe2+4(SiO4)3S (RRUFF)
Locality
Bakstevalåsen, Gunhildrud, Øvre Eiker, Buskerud, Norway
Tagged
pegmatite mineral

Red crystals to 4mm with characteristic triangular cross-sections scattered throughout K-spar amazonite matrix. Danalite, is beryllium bearing, and found typically in tin-beryllium skarns, but also found in NYF style pegmatites as is this occurence.

Danalite

Formula
Be3Fe2+4(SiO4)3
Crystal System
Isometric 
Crystal Habit
Massive 
Cleavage
Indistinct, None, None 
Luster
Vitreous - Greasy 
Color
brown, brownish black, grayish yellow, pink, reddish brown 
Streak
gray white 
Class
Isometric - Hextetrahedral 
Fracture
Uneven 
Hardness
5.5-6 

Data courtesy of Webmineral.

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