vein quartz


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vein quartz

[′vān ‚kwȯrtz]
(petrology)
A rock composed chiefly of sutured quartz crystals of pegmatitic or hydrothermal origin of variable size.
References in periodicals archive ?
The identification of a parallel train of vein quartz and breccia, located 150 m to the east, where float samples returned:
During phase two of the program, the site of the multi-ounce gold sample was re-examined and visible gold was discovered within limonitic vein quartz float.Large blocks and finer talus of vein material mixed with oxidized brecciated vein quartz were also found in several, nearby linear structures.Sporadic outcrops of mineralized, breccia and vein quartz show that these structures strike northeast and dip steeply southeast, and suggest that the mineralized talus is close to its bedrock source.
The specimens consist of massive vein quartz and abundant limonite, with gold wires to about 1 cm.
The region between Pisco and Ica apparently contains more localities for interesting vein quartz. Several habits of quartz from this area have appeared in Lima during the past few years.
Polished sections of vein quartz show small grains of witherite associated with celsian and alforsite.
In 1973 the recovery of industrial-grade vein quartz began to replace pocket quartz.
In 1987 the author estimated the remaining reserves of piezoelectric quartz, crystal quartz and vein quartz for the Soviet State Commission for Raw Materials.
(1954) Vein quartz locations in the vicinity of Busovaca near Sarajevo.
Several specimens exhibit amethyst that has grown in a random fashion on the fracture surfaces of brecciated blocks of vein quartz. These are all elongated in habit, rather than equant; this further indicates the role of the milky quartz substrate in influencing the habit of the amethyst when epitaxially related.