Amethyst crowns the serene visage of a mystical prince. Carved from bone, the mask is set in sterling silver. Balinese designer Buana flanks the medallion with amber to create an exquisite bracelet. .925 Sterling silver When used in jewelry, amber beads can include a stunning arrangement of tones and hues. Natural amber ranges from yellow to deep orange. It may sometimes even have a green cast to it, as well as opaque swirls within. Because amber is the preserved resin of prehistoric trees that grew millions of years ago, it sometimes has tiny inclusions of plants and insects -- making it highly prized.