The Kiki McDonough Eternal collection is aptly named. Each piece is crafted from the finest 18-karat gold and colorful stones, creating a look you'll love for a lifetime. From the Eternal collection. 18-karat yellow gold. Seven assorted floral-shaped stations of amethyst, lemon quartz, citrine, and blue topaz stones; 0.35 total carat weight. Lobster clasp. 17"L.