Black Chalama Opal Ring / cabochon / new- 2.04 g - (1)

Ring Black Chalama Opal / Cabochon / new

Set in 925 sterling silver

7.8 mm x 7.6 mm

Weight: 2.04 g

New and unworn

Ring size:

U 54 - 55 (sits exactly in between)
UK N - O
US 7.0
Fr 14 - 15
Inner diameter: 17.35 mm

Black opals, like their differently colored counterparts, occur as a round to bulbous mass with no recognizable crystal structure. Their beauty typically reveals itself only after the polishing of this material. Characteristic of this form of opals is their opalescence, which appears in an intense rainbow sheen. Additionally, the base rock of the opal here is dark, grayish to black, which gave it this name.

Black opals arise, just like other opals, from silica-rich liquids that crystallize in sedimentary or volcanic rocks. Their characteristic shimmer is due to water inclusions inside this mineral.

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