Pink Opal A quality

Opal is a hydrated silicon oxide and can contain up to 20 percent water. The typical iridescence refraction phenomenon called opalescence is due to the interference of light generated by the regular crystal-like arrangement of silica spheres.
Chemical composition: SiO2 + H2O
Hardness: 5,5 – 6,5
Density:
Family:
Origin: Australia, Mexico, Peru

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