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Mirrorstone Crystals - Crystals and fossils of the natural world.

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chalcedony

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Chalcedony - SKU_A_1623

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Availability: In stock

£14.00
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From: Brazil

Hardness: 4 on the mohr's scale.

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, 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.



WeightDepthWidthLength
0.095kg 5cm 7cm 2cm