Antique Semi-Mounts Vintage Diamond Semi Mount Engagement Ring .50ct Platinum Emerald Cut Deco $2,485 Antique Diamond Sapphire Semi-Mount Engagement Ring Platinum Art Deco Vintage $1,985 Vintage Diamond Semi Mount Engagement Ring Mint 8mm Platinum Art Deco Antique $1,985 Vintage Diamond Two Stone Semi Mount Engagement Ring .50ct Platinum Art Deco $1,950 Antique Diamond Semi-Mount Engagement Ring .60ct Platinum Art Deco Vintage $1,585 Vintage Sapphire Semi Mount Engagement Ring .32ct French Cut 18K Art Deco $1,285 Vintage Semi Mount Engagement Ring Platinum Rare 8mm Antique Art Deco $1,285 Vintage Sapphire Semi Mount Engagement Ring .32ct Marquise 18K Art Deco Antique $1,285 Antique Sapphire Semi-Mount Engagement Ring 18K French Cut Art Deco Vintage $1,285 Antique Diamond Semi Mount Engagement Ring 18K & 14K White Gold Deco Vintage $1,185 Vintage Semi Mount Engagement Ring 18K Antique Art Deco Near Mint $885