Black Opal 7x9-8x10mm Pebble - 15-16-Inch Stone Type_Terahertz transparent or translucent with a

transparent or translucent with a pearly luster

commonly with inclusions of copper in speckled patterns throughout the stone

It's a beautiful specimen

Sapphires are precious gemstones

but a form of natural Serpentine which is commonly referred to as Yellow Jade in the stone industry

Black Opal 7x9-8x10mm Pebble - 15-16-Inch Stone Type_Terahertz transparent or translucent with aBlack 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."