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Difference between revisions of "Chalcedony"
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[[File:Chalcedony stone.jpg|400px|thumb|Specimen of natural chalcedony]] | [[File:Chalcedony stone.jpg|400px|thumb|Specimen of natural chalcedony]] | ||
'''Chalcedony''' is a cryptocrystalline form of silica, composed of very fine intergrowths of [[quartz]] and moganite. These are both silica minerals, but they differ in that quartz has a trigonal crystal structure, while moganite is monoclinic. | '''Chalcedony''' is a cryptocrystalline form of silica, composed of very fine intergrowths of [[quartz]] and moganite. These are both silica minerals, but they differ in that quartz has a trigonal [[crystal]] structure, while moganite is monoclinic. | ||
Chalcedony has a waxy luster, and may be semitransparent or translucent. It can assume a wide range of colors, but those most commonly seen are white to gray, grayish-blue or a shade of brown ranging from pale to nearly black. The color of chalcedony sold commercially is often enhanced by dyeing or heating. | Chalcedony has a waxy luster, and may be semitransparent or translucent. It can assume a wide range of colors, but those most commonly seen are white to gray, grayish-blue or a shade of brown ranging from pale to nearly black. The color of chalcedony sold commercially is often enhanced by dyeing or heating. | ||
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==Spiritual use== | ==Spiritual use== | ||
Chalcedony is a nurturing stone that promotes friendship and goodwill. Its presence may enhance the stability of a group of people including family members, friends, or co-workers. The stone can be used to enhance telepathy and mental transmission. Chalcedony is capable of absorbing negative energy. Blue chalcedony is specifically good for protecting, healing, and otherwise nurturing the throat chakra. | Chalcedony is a nurturing stone that promotes friendship and goodwill. Its presence may enhance the stability of a group of people including family members, friends, or co-workers. The stone can be used to enhance telepathy and mental transmission. Chalcedony is capable of absorbing negative energy. Blue chalcedony is specifically good for protecting, healing, and otherwise nurturing the throat [[chakra]]. | ||
According to [[Heinrich Cornelius Agrippa]], chalcedony is a stone under the planets [[Saturn]] and [[Mercury]] together with the tail of [[Scorpio]] and [[Capricorn]]. | According to [[Heinrich Cornelius Agrippa]], chalcedony is a stone under the planets [[Saturn]] and [[Mercury]] together with the tail of [[Scorpio]] and [[Capricorn]]. | ||