Black Spinel 4mm Natural Round - 15-16 Inch Size_16mm Bird’s Eye Rhyolite is named

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

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At times in ancient history

Rhodochrosite is a bubblegum pink to rose red stone

Black Spinel 4mm Natural Round - 15-16 Inch Size_16mm Bird’s Eye Rhyolite is namedSpinel 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.