Black Opal Australian, Faceted 3mm Round - 15-16 Inch Indigo Gabbro It contains inclusions such as

It contains inclusions such as copper and iron

Historically Opal was renowned as the “Queen of Gems” for its desirability and beauty

light gray or black

Diopside is a calcium and magnesium silicate mineral

which may contain iron oxide

Black Opal Australian, Faceted 3mm Round - 15-16 Inch Indigo Gabbro It contains inclusions such asBlack 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."