Updated as of June 2026
Round Black Diamond
The round cut suits Black Diamond well: the most popular and most brilliant cut, engineered to maximize sparkle. An opaque black diamond valued for bold modern style and associated with strength, confidence, and protection.
Why the round cut works for Black Diamond
The most popular and most brilliant cut, engineered to maximize sparkle. Black Diamond reads more for color than fire, so a round cut is about shape and color rather than sparkle. At Mohs 10, Black Diamond holds a crisp round outline and stands up to everyday wear. Treatment to expect: irradiation or heat (most stones treated black).
Other Black Diamond cuts
Oval Black DiamondEmerald Cut Black DiamondCushion Black DiamondPrincess Black DiamondPear Black Diamond
More on this stone: Black Diamond overview, price guide, and the round cut guide across stones.
Frequently asked questions
Does Black Diamond look good in a round cut?
Yes. Black Diamond reads more for color than fire, so a round cut is about shape and color rather than sparkle. It is hard enough to hold a crisp outline.
How much does a round Black Diamond cost?
Black Diamond runs about $200 to $3,000 per carat. Shape affects price modestly, with round usually the slight premium.
What setting suits a round Black Diamond?
Black Diamond pairs well with white gold, platinum, yellow gold. A halo adds sparkle and size.