| Gewicht | 0,445 kg (445 gr) |
|---|---|
| Dimensions | 7 × 6 × 5 cm |
| Sales Unit | |
| Type | |
| Form | |
| Origin | |
| SKU | 22260 |
Chalcedony Geode
Sales unit: Unique
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Chalcedony Geode from Mexico
Chalcedony
Chalcedony is a microcrystalline variety of quartz that occurs in a wide range of colours, with blue, grey and white being the most recognisable. The stone has a waxy luster and is often translucent. Due to its fine structure, chalcedony is widely used in jewellery and decorative objects.
Chalcedony forms in cavities of volcanic rock, where it deposits layer by layer from silica-rich solutions. It occurs worldwide, with important deposits in Turkey, Namibia, Brazil, the United States and India, among others. Its chemical composition is SiOâ‚‚ and its hardness is around 6.5 to 7 on the Mohs scale.
Sources:
Mindat.org, Gemdat.org, Wikipedia - Chalcedony
