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The Flatiron Diamond Ring is built in 18k yellow gold with a pave setting that locks in round-cut diamonds totaling 3.00 ct — a substantial stone weight that reads across the hand without excess bulk. The warm gold and closely packed stones give it a clean, high-contrast profile that works dressed up or down. It sits flat enough to stack alongside other bands yet carries enough diamond coverage to wear alone. Browse more men's diamond rings to compare settings, stone weights, and gold karats. Verified details include metal of 18k yellow gold, carat weight of 3.00 ct and stone of Diamond. Size: 4.5; 5.5; 6; 6.5; 7; 7.5; 8; 8.5, Available colours: Rose Gold / 4.5, White Gold / 4.5, Yellow Gold / 4.5, Rose Gold / 5, White Gold / 5, Yellow Gold / 5, Rose Gold / 5.5, White Gold / 5.5, Yellow Gold / 5.5, Rose Gold / 6, White Gold / 6 and Yellow Gold / 6 and Available sizes: 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8 and 8.5.