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Quartz var. Smoky with Hyalite, Albite & Zircon

#PD31876

Quartz var. Smoky with Hyalite, Albite & Zircon

#PD31876
Availability
Sold
Size
7 x 9 x 7 cm - Sm Cabinet 
Formula
SiO2 (RRUFF)
Locality
Hirukawa, Gifu Pref., Chubu, Honshu Island, Japan

A large specimen of pegmatite Granite with smoky-gray Quartz crystal points to 2.5cm on mostly white Albite. There is also a fine coating of green microcrystalline Chlorite on the Albite matrix and the terminations of the Quartz crystals. Additionally there is fine coating of white-colorless Opal-AN indicating that the temps were high in the miarolitic cavities during the late Silica deposition stages.

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

Data courtesy of Webmineral.

Collection
Phillips Collection
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