Rhyolite is a volcanic rock. Natural rhyolite displays green, cream and occasional brown hues with fabulous patterns and inclusions. Because of its similar appearance, Rhyolite has been confused with Jasper.
Our Semi Precious Stones are genuine and natural unless they are stated to be synthetic in the description. However, you will find the vast majority of Semi Precious Stones are treated in some way, as they would not be stable enough for use in jewellery in their original state.