Black Chalama Opal Ring / Cabochon / new- 3.58 g - (1)

Ring Black Chalama Opal / Cabochon / new In 925 sterling silver set Weight: 3.58 g New and unworn Ring size: EU 60 UK S US 9.1 FR 20 Inner diameter: 19.1 mm Black opals appear, like their differently colored counterparts, as a spherical to nodular mass without a discernible crystal structure. Their beauty usually reveals itself only after the machining of this mass. Characteristic of this form of opals is their opalescence, which is especially vivid in intense rainbow shimmer. Moreover, the host rock of the opal here is dark, gray to black, which gave it this name. Black opals form, just like other opals, from silicon dioxide-rich fluids that crystallize in sedimentary or volcanic rocks. Their characteristic shimmer is due to water inclusions inside this mineral. Shipping as insured registered mail.

估價:$7.84

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