Pure 24 karat Gold on Silver Crystal Nugget Post Earrings. Large. Silver crystals of rare beauty are formed as a result of a closely monitored chemical process in the refining of pure silver bullion. Only the best specimens are selected for hand crafting into this fine jewelry, then plated with a final heavy coating of pure 24 karat gold. Your personal enjoyment is enhanced by your own original as no two are exactly alike. Approx. Nugget size varies.