Product Code SKU6021. 9ct Yellow Gold Amethyst & Diamond Studs. One of the quartz family Amethyst ranges from pale purple to a deep rich purple has a long history of use in many royal pieces and various religious orders. Amethyst has been suggested to ward of the effects of alcohol whatever its use the stone is a very rich and eye attracting stone in any many different settings or even as beads.Amethyst is the Birthstone for February. Beautifully presented in a gift box.