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Home / Diamonds / Round / 1.5 Carat

1.5 Carat Round Diamonds

At a carat and a half the stone gains genuine board presence on the hand while staying well below the steep price jump at the two-carat threshold — a smart upgrade for buyers who want size without crossing a round-number premium. The round brilliant is the most popular diamond shape — 57–58 facets engineered for maximum sparkle, and the most forgiving of color and clarity. A timeless choice for engagement rings.

86,267 certified 1.5 carat round diamonds in stock — natural and lab-grown.

Filter all 1.5 carat round diamonds

1.32 ct Round lab_grown_diamond

1.32 ct · H · SI1 · ID

Round Diamond

$217

1.32 ct Round lab_grown_diamond

1.32 ct · H · SI2 · ID

Round Diamond

$217

1.38 ct Round lab_grown_diamond

1.38 ct · H · SI2 · ID

Round Diamond

$225

1.3 ct Round lab_grown_diamond

1.30 ct · H · VS1 · VG

Round Diamond

$233

1.31 ct Round lab_grown_diamond

1.31 ct · H · VS2 · ID

Round Diamond

$235

1.3 ct Round lab_grown_diamond

1.30 ct · D · SI1 · ID

Round Diamond

$244

1.3 ct Round lab_grown_diamond

1.30 ct · D · SI1 · ID

Round Diamond

$244

1.3 ct Round lab_grown_diamond

1.30 ct · D · SI1 · EX

Round Diamond

$244

1.33 ct Round lab_grown_diamond

1.33 ct · E · SI1 · ID

Round Diamond

$244

1.34 ct Round lab_grown_diamond

1.34 ct · I · SI1 · ID

Round Diamond

$246

1.37 ct Round lab_grown_diamond

1.37 ct · H · SI1 · ID

Round Diamond

$246

1.25 ct Round lab_grown_diamond

1.25 ct · E · SI1 · ID

Round Diamond

$246

1.26 ct Round lab_grown_diamond

1.26 ct · E · SI1 · ID

Round Diamond

$247

1.28 ct Round lab_grown_diamond

1.28 ct · E · SI1 · VG

Round Diamond

$248

1.27 ct Round lab_grown_diamond

1.27 ct · E · SI1 · ID

Round Diamond

$249

1.29 ct Round lab_grown_diamond

1.29 ct · F · SI1 · EX

Round Diamond

$249

1.33 ct Round lab_grown_diamond

1.33 ct · F · SI1 · ID

Round Diamond

$252

1.26 ct Round lab_grown_diamond

1.26 ct · E · SI1 · EX

Round Diamond

$252

1.28 ct Round lab_grown_diamond

1.28 ct · E · SI1 · VG

Round Diamond

$252

1.49 ct Round lab_grown_diamond

1.49 ct · E · SI1 · VG

Round Diamond

$254

1.32 ct Round lab_grown_diamond

1.32 ct · E · SI1 · GD

Round Diamond

$254

1.33 ct Round lab_grown_diamond

1.33 ct · G · VS2 · ID

Round Diamond

$255

1.46 ct Round lab_grown_diamond

1.46 ct · F · SI1 · EX

Round Diamond

$255

1.46 ct Round lab_grown_diamond

1.46 ct · F · SI1 · ID

Round Diamond

$255

1.5 Carat Round diamonds — common questions

How much does a 1.5 carat round diamond cost?: It depends on the 4Cs and whether the stone is natural or lab-grown — a lab-grown round gives you the full 1.5 carat look for a fraction of a natural's price. Our diamond price calculator returns a live average from current inventory, or you can compare the in-stock stones below.
Is a 1.5 carat round diamond a good size for an engagement ring?: Yes. 1.5 Carat is a popular, well-proportioned center, and every round diamond we carry is independently certified (GIA or IGI). Pick your stone and set it into a matching ring through build-your-own.
Do you carry both natural and lab-grown 1.5 carat round diamonds?: We carry both at this weight. Lab-grown gives you more size for the budget while natural carries traditional rarity — use the Natural and Lab filters to compare side by side. Both come fully certified.

More round diamonds by carat

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