Black Spinel 4x8mm Faceted Rondelle - 15-16 Inch R1339 but can also appear silver

but can also appear silver

Porcelain Agate is a natural agate that is dyed and heated to give it the unique blue/white color and pattern that resembles porcelain

It can even exhibit various colors within the same specimen

brown and tan with some beads or inclusions of rust and rose

Black Spinel 4x8mm Faceted Rondelle - 15-16 Inch R1339 but can also appear silverSpinel 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.