ArmentaNew World Large Oval Opal Blue Topaz RingDetailsInspired by Christopher Columbus' journals, Armenta presents the New World collection-characterized by bright metal, mixed materials, and unexpected colors. Wear this Maltese cross ring to add a whisper of romanticism. From the New World Collection. Platinum-washed sterling silver with Cravelli cross details. Faceted opal and blue topaz doublet center. Pave diamonds set in 18-karat white gold. 0. 31 total diamond carat weight. 26. 31 total opal carat weight. Face, 1"L. Designer About Armenta: When Texan Emily Armenta first created a feminine, Spanish-inspired line of oxidized sterling silver pieces set with diamonds and gemstones, her goal was to create romantic jewelry with a rocker edge. Her Armenta collection of distinctive jewelry is a favorite of Hollywood's elite.