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Topaz

#AH53391

Topaz

#AH53391
Availability
Sold
Size
3 x 3 x 2.5 cm - Thumbnail 
Formula
Al2SiO4F2 (RRUFF)
Locality
Tarryall Mtns., Park Co., Colorado, United States

Faint green, gemmy, textbook Topaz crystal showing at least eight faces some with shallow striations. An interesting feature at the intersection of the two main faces is the serrated termination caused by micro striations on both of the faces. You can feel this when your fingernail is slid down the edge. This locality is probably the most well-known and collected area in Colordao for Topaz.

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
Arnold G Hampson Collection
Mineralpedia
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WebMineral
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