Opal - Its Fascinating History and Healing Power

Australianopaldirect14 Dec, 2022Business

Opal encompasses a hardness of five.5 to 6.5 and relative density of two.1 to 2.2 and encompasses a tenuity. it's clear to opaque, encompasses a vitreous, greasy, dull, or waxy luster, and leaves a white streak. it's one by one refractive, and it's porous. during this case, it's dangerous to immerse it in any liquids apart from water.