Multi Spinel 2x3mm Faceted Rondelle AA Grade - 15-16 Inch Ruby Fuchsite stalactites

stalactites

Feldspars are a group of rock-forming aluminium tectosilicate minerals

with a Mohs Hardness of 8

sometimes containing rainbow inclusions

Multi Spinel 2x3mm Faceted Rondelle AA Grade - 15-16 Inch Ruby Fuchsite stalactitesSpinel 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.