Black Chalama Opal Ring / cabochon / new- 3.55 g - (1)

Ring Black Chalama Opal / Cabochon / new

Set in 925 sterling silver

Weight: 3.55 g

New and unworn

Ring size:

EU 60
UK S
US 9.1
FR 20
Inner diameter: 19.1 mm

Black opals, like their differently colored counterparts, occur as a spherical to knobbly mass with no recognizable crystal structure. Their beauty usually reveals itself only after the stone is cut/polished. Characteristic of this form of opals is their opalescence, which often appears as an 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 silica-rich fluids that crystallize in sedimentary or volcanic rocks. Their characteristic sheen is due to water inclusions within the interior of this mineral.

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