- 14K Yellow 5x5 mm Square Solitaire Engagement Ring Mounting with 0.20 Carat Round Diamondstyle 12404618K Yellow 5x5 mm Square Solitaire Engagement Ring Mounting with 0.25 Carat Round Diamondstyle 12404614K Yellow 5x5 mm Square Solitaire Engagement Ring Mounting with 0.20 Carat Princess Diamondstyle 12404614K Yellow 5x5 mm Square Solitaire Engagement Ring Mounting with 0.22 Carat Asscher Diamondstyle 124046