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Thortveitite

#PD34233
SOLD
Thortveitite from Flåt Feldspar Quarry, Flåt, Evje og Hornnes, Aust-Agder, Norway - PD34233
Thortveitite from Flåt Feldspar Quarry, Flåt, Evje og Hornnes, Aust-Agder, Norway - PD34233

Thortveitite

#PD34233
Availability
Sold
Size
3 x 5 x 2.5 cm - Miniature 
Formula
Sc2Si2O7 (RRUFF)
Locality
Flåt Feldspar Quarry, Flåt, Evje og Hornnes, Aust-Agder, Norway
Tagged
REE mineral

Slender greenish Thortveitite crystals to 7-8mm embedded throughout a piece of reddish Feldspar matrix.

Thortveitite is a relatively rare REE Silicate that was discovered in Norway and named for Olaus Thortveit, a feldspar and mineral exporter.

Thortveitite

Formula
Sc2Si2O7 
Crystal System
Monoclinic 
Crystal Habit
Crystalline - Fine, Radial, Prismatic 
Cleavage
Perfect, None, None 
Luster
Vitreous - Adamantine 
Color
brown, grayish black, black, grayish green 
Streak
gray 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal 
Hardness
6.5 

Data courtesy of Webmineral.

Collection
Phillips Collection
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