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Quartz var. amethyst

#45196
SOLD
Quartz from Boulder Batholith, Silver Bow Co., Montana, United States - 45196
Quartz from Boulder Batholith, Silver Bow Co., Montana, United States - 45196

Quartz var. amethyst

#45196
Availability
Sold
Size
7 x 4.5 x 4 cm - Sm Cabinet 
Formula
SiO2 (RRUFF)
Locality
Boulder Batholith, Silver Bow Co., Montana, United States

A very complex specimen with numerous doubly terminated crystals of both smoky and amethyst Quartz. All the crystals are in parallel growth. One end seems to be smokier than the other, which is more amethyst. Much of it seems to be in sceptor growth. Have fun with this one, you will stare at it for hours.

The index catalog card from Chris's collection states that it was collected by Zach Johnson in 2004. 

Quartz

Formula
SiO2 
Crystal System
Trigonal 
Crystal Habit
Crystalline - Coarse, Druse, Crystalline - Fine 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
brown, colorless, violet, gray, yellow 
Streak
white 
Class
Trigonal - Trapezohedral 
Fracture
Conchoidal 
Hardness
7 

Data courtesy of Webmineral.

Collection
Chris van Laer Collection
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