Renna 18-Karat Yellow Gold Dream Shell Amethyst and Diamond Earrings. Named after an ancient Greek word (amethustos) meaning “sober,” amethyst is known for its ability to purify the mind and allow for intuition, creativity, and peace, making it a great stone for practicing meditation and problem-solving. Fishhook closure adorned with diamonds. For Pierced Ears. Made in New York. Recycled Gold. We use 100% recycled 18-karat gold and create each of our pieces by hand.