Black Chalama Opal Ring / cabochon / new- 3.52 g - (1)

Ring Black Chalama Opal / Cabochon / new

In 925. Sterling silver set

Weight: 3.52 g

New and unworn

Ring size:

U 57 - 58 (sits right between)
UK P 1/2 - Q 1/2
US 8.2
Fr 17 - 18
Inner diameter: 18.35 mm

Black opals occur, just like their differently colored counterparts, as spherical to knobby masses with no recognizable crystal structure. Their beauty usually reveals itself only when the stone is cut.

Characteristic of this form of opals is their opalescence, which manifests in an intense rainbow sheen.

Moreover, the host rock of the opal here is dark, gray to black, which gave it this name.

Black opals, like other opals, form from silica-rich liquids that crystallize in sedimentary or volcanic rocks. Their characteristic shimmer is due to water inclusions within the interior of this mineral.

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