Birds Eye Rhyolite 10mm Large Hole Round - 8-Inch 13x20-20x28mm Black Tourmaline is a black

Black Tourmaline is a black crystalline aluminum borosilicate mineral with occasional light gray inclusions that appear as flecks or veins

iron or manganese impurities within the stone

as it is softer than both Jasper and Rhyolite

and we offer it when we can

Malachite is a copper carbonate with a bright green color and dark green banding

Birds Eye Rhyolite 10mm Large Hole Round - 8-Inch 13x20-20x28mm Black Tourmaline is a blackBirds Eye Rhyolite is named for its circular color formations of deep reds, light tans and earthtones. Rhyolite was named "streaming rock" because of its beautiful bands, bubbles and crystal rich layers that form as lava flows onto the surface of stone