Turquoise, birthstone for December, is formed when copper-rich groundwater seeps down and reacts with minerals containing phosphorus and aluminum. The result is breathtaking, producing beautiful colors, ranging from clear blues to greens and even periwinkle! Some stones are perfectly clear, while others have beautiful veins and markings. Turquoise is versatile and durable, lending itself to rings, necklaces, earrings and bracelets… pretty much everything!