Opal Gemstone Called 'Rainbow Tree' – Geology In
This Beautiful Boulder Opal Called the 'Rainbow Tree' From Queensland, Australia will blow your mind. Rainbow tree opal is a type of opal that is characterized by its colorful bands that resemble tree trunks. It's so amazing to see these natural pieces of crystal, created from the Earth. Some of them thousands of years old, crystallizing and taking form. It is formed when water containing silica m
