quartz
click on an example of quartz to get a better picture!
anthracite
supplied by J R Henderson & Sons, Elginaosta
supplied by J R Henderson & Sons, Elginathena
supplied by J R Henderson & Sons, Elginauby
supplied by J R Henderson & Sons, Elginbeige starlight
supplied by J R Henderson & Sons, Elginblack starlight
supplied by J R Henderson & Sons, Elginblue starlight
supplied by J R Henderson & Sons, Elginice white
supplied by J R Henderson & Sons, Elginnero
supplied by J R Henderson & Sons, ElginShow More
For more examples of quartz please have a look on our supplier’s link