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 and 1.46 (monorefractive)

- Weight: 6.05 Kt

- Size 28.60 x 17.10 x 2.20 mm

- Cut: butterfly shape carving

- Color: Milky white mass with strong spots opalescence with undefined yellow, red, green and light blue contours

- Treatments: none

- Origin: Lightning Ridge - Australia -