Ring – Pearl gold and Diamonds 18 carat gold (kt) pink gold: 8.50 grams (gr). Diamonds brilliant cut: 0.95 total weight carat (ct) (Hcolour VS clarity). Australian gold pearl: 12.50 carat (ct) - Diameter 13 mm. Size: 6.50 inches (Usa) | 13 mm (Italy). Codex: Erss.