Cartier 18K Yellow Gold Emerald & Pearl Panther Ring Cartier Unisex Rings. SKU: 66371. Color: Yellow. Metal Type: Gold. Metal Stamp: 18k. Metal Weight: 14.2g. Gem stone type: Emerald. Stone color: Green. Ring style: Fashion. Pre-Owned Cartier 18K Yellow Gold Emerald Pearl Panther Ring.