Amethyst Diamond Cluster Earrings in 14k Yellow Gold.  These gorgeous amethyst and diamond cluster earrings are finished in 14 karat yellow gold. These earrings are just bright and fun and fabulously purple! Featuring 1.6 carats of diamonds accenting four (4) wonderful amethysts, they really sparkle even in the faintest light. They are clip on, but can easily be converted to posts!