Black Opal Australian, Faceted 4mm Round - 15-16 Inch Stone Type_Apatite Due to its color and

Due to its color and clarity

The presence of Manganese within the stone produces the purple hue

it is made up of volcanic glass

Gem Silica occurs in a vivid blue green color due to the presence of copper in the stone and is free of inclusions of other minerals

Black Opal Australian, Faceted 4mm Round - 15-16 Inch Stone Type_Apatite Due to its color andBlack 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."