For a change of pace I decided to try faceting some green chalcedony that I've got. Usually this material is cut as a cabochon but I wanted to try something a little different to see how it turned out. This material was sold to me as untreated. It is a lovely green with good translucence.
* Recently on the gemology forum that I subscribe to, a fellow member stated that he also had bought a parcel of green chalcedony from Western Australia. He had sample stones tested by the GIA laboratory in Bangkok and they determined the stone to be natural and untreated chrome-bearing chalcedony. Pictures of the stone match with the material I have in colour and appearance. The chrome content makes the green quite vibrant. This, coupled with good translucence makes this stone quite special.