Black Spinel 15mm Pinwheel - 8 Inch 8mm Bicones laced with bands or swirls

laced with bands or swirls of brighter blue

then brought to the surface by volcanoes and earthquakes

This variety of Amazonite is actually a combination of Amazonite

” Most deep red Carnelian has been heat treated to darken the beautiful orange and red tints that are created by iron oxides in the stone

Black Spinel 15mm Pinwheel - 8 Inch 8mm Bicones laced with bands or swirlsSpinel 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.