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Independently certified, most by IGI · Laser inscribed
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2.5 Carat Lab Grown Diamonds

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Buying guide

Choosing 2.5 carat lab grown diamonds.

A 2.5 ct round is about 8.7 mm. At this size a slightly warmer color such as H or I still faces up white in a yellow or rose gold setting, which leaves more of the budget for cut and size.

Two and a half carats sits just under the three carat mark, and most people can't tell the difference on the hand.

2.5 Carat lab grown diamonds at a glance

  • 377 colorless stones in stock between 2.50–2.99 ct, mostly round, princess, pear and square radiant
  • Listed prices from $700, median $992 (about $368 per carat)
  • Round face-up size: 8.6–8.8 mm
  • Most stones IGI certified, laser-inscribed, with real photos and 360° video

How to choose a 2.5 carat lab diamond

Stones just under a round number (2.90 ct rather than 3.00 ct) often cost less per carat with no visible difference. Filter by carat to find them.

Some stones are priced on request. Ask about any of them and our graders in Surat reply personally.

How much is a 2.5 carat lab grown diamond?

Priced 2.5 carat stones at Culture Carats start at $700, with a median of about $990.

Compare sizes on the true-scale carat guide, check prices with the price-per-carat chart, or set your stone in a custom ring made in Surat.

Prices are listed prices in USD for colorless stones, October 2026. They change daily with inventory.

Questions

Questions about 2.5 carat lab grown diamonds.

How big is a 2.5 carat lab grown diamond?

A 2.5 carat round brilliant is about 8.6 to 8.8 mm across.

Is a 2.9 carat cheaper than a 3 carat?

Usually. Prices step up at round numbers, and a stone just under 3 carats looks almost the same once set.

Which color should I choose at 2.5 carats?

In yellow or rose gold, H or I color still faces up white. In white gold or platinum, D to G keeps the stone icy.

Are 2.5 carat lab diamonds certified?

Most carry an independent grading report, usually from IGI, with the report number laser-inscribed on the girdle.