Black Opal Australian, Faceted 4mm Round - 15-16 Inch Green Brecciated Jasper Dakota Stones Cuprite ranges from

Dakota Stones Cuprite ranges from pale to deep blue-green

Mohs hardness 7

but can be distinguished by its structure and its lower relative hardness

Its needle to like inclusions of hematite are iridescent red

Denim Lapis has the brilliant blue and gold of higher end Lapis

Black Opal Australian, Faceted 4mm Round - 15-16 Inch Green Brecciated Jasper Dakota Stones Cuprite ranges fromBlack 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."