Black Chalama Opal 2 stud earrings / cabochon / new- 1.04 g - (2)

2 Black Chalama Opals Stud Earrings / Cabochon / new Set in 925 sterling silver Total weight: 1.04 g 5.8 mm x 5.8 mm x 15.0 mm New and unworn Black opals, like their differently colored counterparts, occur as spherical to bumpy masses with no discernible crystal structure. Their beauty usually reveals itself only after sawing through this. Characteristic of this form of opal is its opalescence, which shines with an intense rainbow glow. The host rock of the opal here is dark, grayish to black, which earned it this name. Black opals, just like other opals, form from silica-rich fluids that crystallize in sedimentary rocks or volcanics. Their characteristic shimmer is due to water inclusions inside this mineral. Shipping as insured registered mail.

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