When we completed the Quartz and Chalcedony gemstone variety pages, we felt we included all the important ones. However, it was suggested to us that Onyx should also be included, depsite the fact that its usage today is fairly limited. So we are proud to present our new gemstone page on Onyx, thus really completing the important Quartz/Chalcedony gemstone varieties.
We have also added cross-links from the Quartz mineral pages to the important gemstone variety pages.
