Deactivated listings › 22K Gold - Opal - Tanzanite Necklace Image 1 of 1 22K Gold - Opal - Tanzanite Necklace $650.00 Sold Out Gorgeous opal set in 22k gold with a fine silver back - all strung on tiny, gemmy tanzanite! Measures 16 inches. OOAK! Sold Out Added! Gorgeous opal set in 22k gold with a fine silver back - all strung on tiny, gemmy tanzanite! Measures 16 inches. OOAK!