Natural Gemstone Rings Plain and Celtic silver rings set with British quartz, jasper and carnelian, gemstones I collect by hand in the north of England, and a ‘piece of Northumbria’. I handcraft the stones into cabochons to set in silver. Faceted gemstone rings include Australian sapphire, amethyst, garnet, topaz and citrine, precision-cut at Northumbria Gems. These are also traditional birthstones. Handmade in England.