18KW Boulder Opal Bezel Post Earrings
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18KW post back earrings are 9x6mm-10x7mm with a pair of stunning natural boulder opals.
Opal is the product of seasonal rains drenching dry ground in regions such as Australia's semi-desert outback. The waters soaked deep into underground rock, carrying dissolved silica into the layers, and the silica deposits formed opal. Boulder opal is when the original host rock containing seams of opal is fashioned into a finished gem. Opal is known for a unique display of flashing rainbow colors, created by microscopic spheres breaking lightwaves into spectral colors. This play-of-color shows attractively on the dark background of the host rock.