Black Spinel 3mm Natural Round - 15-16 Inch Color_Turquoise Usually occurring in a deep

Usually occurring in a deep red color

and Rutile as well

orange and rust are due to traces of hematite within the stone

mata ratón

Rutile is the mineral name for natural crystals of titanium dioxide

Black Spinel 3mm Natural Round - 15-16 Inch Color_Turquoise Usually occurring in a deepSpinel 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.