Black Spinel 2-3x5-6mm Faceted Irregular Tyre Beads - 8-Inch Size_18x25-20x30mm This Phantom Quartz is gray

This Phantom Quartz is gray

The opaque stone’s red color is due to high iron content

Wood Opalite is a type of petrified wood that has been impregnated with the Silicon Dioxide commonly known as Opal

some with subtle hue changes and others with high contrast

Black Spinel 2-3x5-6mm Faceted Irregular Tyre Beads - 8-Inch Size_18x25-20x30mm This Phantom Quartz is graySpinel 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.