Black Chalama Opal Ring / cabochon / new- 3.46 g - (1)

Ring Black Chalama Opal / Cabochon / new

In 925. Sterling silver mounted

Weight: 3.46 g

New and unworn

Ring size:

U 58
UK Q 1/2
US 8.4
FR 18
Inner diameter: 18.5 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 after the polishing of this material.

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

Additionally, the base rock of the opal here is dark, grayish to black, which gave it this name.

Black opals form, just like other opals, from silicon dioxide–bearing fluids that crystallize in sedimentary or igneous rocks.

Their characteristic glow is due to water inclusions inside this mineral.

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