The Quartz Page: Rock Crystal
"Rock Crystal" is the name for clear, colorless quartz. In a sense, rock crystal is the ideal image of quartz. The term crystal goes back to the Greeks, who once ...
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"Rock Crystal" is the name for clear, colorless quartz. In a sense, rock crystal is the ideal image of quartz. The term crystal goes back to the Greeks, who once ...
Obsidian is the result of volcanic lava coming in contact with water. Often the lava pours into a lake or ocean and is cooled quickly. This process produces a ...
Quartz Varieties Quartz crystals or aggregates that share certain peculiar physical properties have been classified as quartz varieties with specific "trivial names".
last modified: Thursday, 16Feb2012 23:23:59 CET. Document status: complete. Flint and chert are dense, cryptocrystalline varieties of quartz, slightly translucent ...
Sale Cabochons Gallery 1 : Rhodonite Cabochons: Sale Cabochons Gallery 2 : Sonoran Sunrise Chrysocolla Cabochons: Sale Cabochons Gallery 3 : Porcelain Jasper ...
sil·i·ca (sĭl′ĭkə) n. A white or colorless crystalline compound, SiO2, which in the form of quartz and certain other minerals is a chief component of the ...
Introduction. Silica is the name given to a group of minerals composed of silicon and oxygen, the two most abundant elements in the earth''s crust.
Silica Sand is quartz that over time, through the work of water and wind, has been broken down into tiny granules. Commercial Silica Sand is widely used as a proppant ...
Geology and Mineralogy of Quartz Crystals General Geology. MOST OF THE QUARTZ veins are restricted to a belt about 30 to 40 miles wide that extends a distance of ...
Quartz is an important mineral with numerous uses. Sand, which is composed of tiny Quartz pebbles, is the primary ingredient for the manufacture of glass.
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