Black Opal 4mm Round Faceted - 15-16 Inch featured_7162026 Zachery-processed turquoise has similar gemological

Zachery-processed turquoise has similar gemological properties to untreated turquoise

It is a form of Chrysoberyl

Its inclusions of golden tones to rust to red are due to traces of hematite embedded in the stone

it lightens because of further weathering and becomes Malachite

Black Opal 4mm Round Faceted - 15-16 Inch featured_7162026 Zachery-processed turquoise has similar gemologicalBlack Opal is a naturally occurring variety of precious opal mined in Australia. this opal variety is characterized by their dark base tone. It is mined under extremely harsh conditions and the high grade specimens are more rare than diamonds. Australian Aboriginal tribes referred to Black Opal as "Fire of the Desert."