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Jasper:
Tectosilicates (A variety of quartz often with some iron and aluminum) SiO2 AKA: Chalcedony, Hornstone |
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System: None; chalcedony is a microcrystalline variety of quartz. Appearance: Variegated and mottled red, yellow, green and brown. Dull waxy to vitreous luster depending on granularity and the variety; streak white Physical Properties: Hardness: (6.5 - 7); Specific gravity: (2.6 - 2.64). Cleavage: None. Smooth conchoidal fracture; transparent when colorless, otherwise translucent to opaque as colors get darker; fracture, brittle to tough. Similar species: Very few minerals are confused with chalcedony. Occurrence: Chalcedony is formed in several environments, generally near the surface of the earth where temperatures and pressures are relatively low. It commonly forms in the zone of alteration of lode and massive hydrothermal replacement deposits and as bodies of chert in chemical sedimentary rocks. Jasper can be found in California, Arkansas and Texas. Miscellaneous: The name is derived from the Greek and means "spotted stone". Sometimes it is called hornstone, but this usually only refers to the gray variety. Jasper is most often fashioned into cabochons or cameos. Uniformly colored jaspers are rare; usually it is multi-colored, striped or spotted. Conventional Wisdom: Jasper is said to be both invigorating and stabilizing, bringing stillness to a troubled mind. It generates an even rhythmic pulse. It is also said to improve the sense of smell and to overcome depression. Used also for digestion and stomach problems, biliousness and bladder trouble. Protects from witchcraft, soothes the nerves. Yellow Jasper: Assist and protect in times of travel. Red Jasper: Thought to induce health and rebirth, bringing freshness in ideas and strategies to the holder. Picture Jasper: Is known as the stone for global awareness. It stimulates the brotherhood to work together and save the planet. Belongs to the Astrological Sign of Leo. |