The Concho Cross earrings are composed of Sonoran Gold Turquoise and sterling silver. The silver cross is hand-sawed and fabricated. These earrings hang at 2.25". These come with sturdy earring backs. BOTTOM STONES: Sonoran Gold Turquoise is mined in Mexico near Cananea. Unlike most turquoise, Sonoran Gold is not mined in veins but rather as individual nuggets typically found in clay deposits. This beautiful turquoise comes in aqua blue, lime green, and a two-tone blue and green. It features a beautiful golden to brown matrix. Note to Buyers: All of Solstice Studio items are handmade and hand-finished. Each piece is one of a kind and you may notice some imperfections. These imperfections give handcrafted items their innate, soulful character and appeal. All pieces come with a drawstring pouch and custom drawer box - always ready for gift giving.