Black Chalama Opal Ring / cabochon / new- 2.44 g - (1)

Ring Black Chalama Opal / Cabochon / new

In 925. Sterling silver set

10,5 mm x 7,4 mm

Weight: 2.44 g

New and unworn

Ring size:

U 56
UK P
US 7,6
Fr 16
Inner diameter: 17,8 mm

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

Characteristic for this form of opals is their opalescence, which appears as an intense rainbow shimmer.

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

Black opals, like other opals, form from siliceous liquids that crystallize in sedimentary or volcanic rocks. Their characteristic sheen is due to water inclusions inside the mineral.

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