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Topaz with feldspar

#PD41993

Topaz with feldspar

#PD41993
Availability
Sold
Size
3.5 x 3 x 3 cm - Miniature 
Formula
Al2SiO4F2 (RRUFF)
Locality
Diamond Rocks, Mourne Mts, Co. Down, Northern Ireland
Tagged
pegmatite mineral

A 3mm waterclear Topaz crystal with complex termination with Orthoclase crystals in pegmatite matrix.

Topaz

Formula
Al2SiO4F2 
Crystal System
Orthorhombic 
Crystal Habit
Crystalline - Coarse, Prismatic, Massive - Granular 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
colorless, pale blue, yellow, yellowish brown, red 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Uneven 
Hardness

Data courtesy of Webmineral.

Collection
Phillips Collection
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