Nava Zahavi Ocean Sky Para Necklace with Peridot Beads, Blue Topaz and 24K Gold. An accident of man and nature created "ocean sky," a material retrieved when an ancient glass and porcelain production was uncovered in Asia. Here, Israeli fine jewelry designer Nava Zahavi adds natural peridot beads and 24K gold accents. Faceted blue topaz (17 X 20MM) pendant is framed with pure 24K Gold. Necklace features strong, lower karat gold hook clasp, and it measures about 17" in length.