Black Opal Australian, Faceted 4mm Round - 15-16 Inch Stone Type_Apatite Famous malachite mines in the

Famous malachite mines in the Ural mountains of Russia once produced 20-ton blocks of the stone

Jade has been used for tens of thousands of years

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

it is made up of volcanic glass

known as "azure

Black Opal Australian, Faceted 4mm Round - 15-16 Inch Stone Type_Apatite Famous malachite mines in theBlack 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."