Black Chalama Opal Ring / polished / new- 2.38 g - (1)

Ring Black Chalama Opal / polished / new Set in 925 sterling silver 11.9 mm x 7.2 mm Weight: 2.38 g New and unworn Ring size: U 54 UK N US 6.8 FR 14 Inner diameter: 17.2 mm Black opals appear, just like their differently colored counterparts, as globular to knobbly masses with no recognizable crystal structure. Their beauty usually becomes apparent only upon the finishing of this surface. Characteristic of this form of opals is their opalescence, which is highly evident in intense play-of-color. Additionally, the host rock of the opal here is dark, grayish to black, which gave it this name. Black opals form, like other opals, from siliceous fluids that crystallize in sedimentary or volcanic rocks. Their characteristic shimmer is due to water inclusions within the interior of this mineral. Shipping as insured registered mail.

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