Opal

Description

Non crystallized hydrated silicon oxide

General physical properties: hardness from 5.5 to 6.5 - very low density from 1.98 to 2.20 g / cm3 - refractive index from 1.44 to 1.46 (mono-refractive)

Weight 6.82 ct

Size 10.90x16.20x8.30 mm

Cut: Drop shaped cabochon

Color: cream-colored mass with strong opalescence in spots with not well defined edges of green, blue, yellow, orange color

Treatments: none

Origin: Shewa Province - Ethiopia -