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Amethyst with Cristobalite 12.21 ct.



300,00 €

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Amethyst with Cristobalite  12.21 ct.

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Amethyst with Cristobalite

The Cristobalite is one of the three silica forms, it crystallized at an higher temperature compare to quartz: 1710C° instead for the quartz is 870 C° and the tridimite is 1470C°.

Generally the crystals are fibrous-rounded balls and in this amethyst are very visible.

Unusual stone for collector.

Size: 19.4x15.4x5.7 mm.

Weight: 15.21 ct.



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