Renna's Galaxy Necklace is crafted in 18K gold and features faceted rock crystal backed with luminous Australian opals. Main Material: 18K Gold. Gemstones: Approximately 2.0 TCW Diamonds, 34.0 TCW Australian Opal. Adjustable Length: 16–17 in. Hirshleifers offers a range of pieces from this collection in-store. For personal consultation and detailed information about this jewelry piece, please contact our dedicated stylist team at personalshopping@hirshleifers.com. This item may be restricted for online purchase for international clients. For assistance purchasing this item, please contact our dedicated stylist team at personalshopping@hirshleifers.com. DESIGNER STYLE ID: N-508-A0 COLOR: YG/OPAL