Black Spinel 8mm Faceted Rondelle Large Hole (2-2.5mm) 8-Inch Turquoise Alternatives Moroccan Agate is a variety

Moroccan Agate is a variety of Chalcedony

Unlike other forms of opal

Azurite often occurs with green Malachite

Charoite is a stone that naturally occurs in intense purple hues

and architecture

Black Spinel 8mm Faceted Rondelle Large Hole (2-2.5mm) 8-Inch Turquoise Alternatives Moroccan Agate is a varietySpinel 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.