Black Spinel 9x13mm Twisted Drop - 8 Inch 3mm including Moonstone

including Moonstone

” Tourmaline is unusual in that it is both pyroelectric and piezoelectric

originally from the Lapis-Lazuli mine in Afghanistan

Rhodonite belongs to the Pyroxenoid group of minerals

Yellow Opal is transparent to opaque

Black Spinel 9x13mm Twisted Drop - 8 Inch 3mm including MoonstoneSpinel 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.