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|Dimensions (mm)||not provided|
|Weight (carats)||not provided|
BLUE CHALCEDONY STONE
This is a chalcedony stone ready for ring or pendant
Weight 9.72 cts app
Size 18 x 13 x 6 mm app
Chalcedony is a cryptocrystalline form of silica, composed of very fine intergrowths of the minerals quartz and moganite These are both silica minerals, but they differ in that quartz has a trigonal crystal structure, whilst 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 mineral gets its name from the town of Chalcedon.
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