Black Spinel 9x13mm Twisted Drop - 8 Inch 5mm Blue Green but it is opaque as

but it is opaque as well

believed to have a special significance to those in romantic relationships

improving concentration

after its type locality

currently believed to be due to the presence of a copper-based mineral such as Malachite or Azurite

Black Spinel 9x13mm Twisted Drop - 8 Inch 5mm Blue Green but it is opaque asSpinel is a hard vitreous magnesium aluminum oxide, and comes in a range of other colors, but those varieties are transparent. Black Spinel not only has the dark color, but it is opaque as well, rendering its black especially deep and mysterious. Sometimes called the "Black Prince's Ruby" for its role in the English crown. It has been mistaken for ruby and sapphire at times, but can be distinguished by its structure and its lower relative hardness.