Rose Gold Amethyst Necklace, Trillion . Warm pink hued 14K gold frames a gorgeous 7mm Trillion cut Amethyst in a deep rich purple color. Amethyst is the traditional birthstone of the month of February. As a stone it is fairly good for wearing everyday as it is pretty hard. On the Mohs scale it is a 7 in comparison to a diamond which is a 10 and is the hardest. This pendant is a slider on a 18" wheat chain, our strongest and most recommended chain style. This is a feminine piece in a very royal color combination!