Black Spinel 4mm Natural Round - 15-16 Inch Size_16mm this gemstone in its polished

this gemstone in its polished state looks like what it would be like to capture smoke in a stone -- bottomless black mixed with white wisps

Like other Agates

It is considered a stone of love and has been called the Stone of the Compassionate Heart

It is believed by some to improve memory and increase analytical skills

Bird’s Eye Rhyolite is named for its circular color formations of deep reds

Black Spinel 4mm Natural Round - 15-16 Inch Size_16mm this gemstone in its polishedSpinel 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.