Black Chalama Opal Ring / cabochon / new- 2.54 g - (1)

Ring Black Chalama Opal / Cabochon / new

In 925 sterling silver set

10.1 mm x 8.4 mm

Weight: 2.54 g

New and unworn

Ring size:

EU 54
UK N
US 6.8
FR 14
Inner diameter: 17.2 mm

Black opals occur, just like their differently colored counterparts, as spherical to nodular masses with no recognizable crystal structure. Their beauty usually reveals itself only after the cutting of these stones.

Characteristic of this form of opals is their opalescence, which shows itself in an intense rainbow shimmer.

Additionally, the host rock of the opal here is dark, greyish to black, which gave it its name.

Black opals form, like other opals, from siliceous fluids that crystallize in sedimentary or volcanic rocks.

Their characteristic sheen is due to water inclusions inside the mineral.

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