Rock Crystal is a colourless variety of Quartz. Rock Crystal does not contain enough trace minerals to affect its coloration, so it appears clear. Natural inclusions are common place and add to their beauty.
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.