Black Spinel 3mm Natural Round - 15-16 Inch HPS02252022 It was originally named for

It was originally named for the visible inclusions of the mineral Cacoxenite

although the colors are much more muted

and it has been used throughout history for various purposes

This makes sapphires very durable and scratch-resistant

It is a translucent to transparent stone with a soft pale pink to rose red hue

Black Spinel 3mm Natural Round - 15-16 Inch HPS02252022 It was originally named forSpinel 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.