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

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Buying guide

Choosing 4 carat lab grown diamonds.

A 4 carat round is about 10.2 mm across. At this size the diamond is the whole design, so think about setting height and prong style early; our team can help you match a stone to a setting.

Four carats is red-carpet territory, and lab grown is the only way most people will ever wear one.

4 Carat lab grown diamonds at a glance

  • 488 colorless stones in stock between 4.00–4.99 ct, mostly princess, round, radiant and emerald
  • Listed prices from $1,047, median $1,780 (about $433 per carat)
  • Round face-up size: 10.1–10.3 mm
  • Most stones IGI certified, laser-inscribed, with real photos and 360° video

How to choose a 4 carat lab diamond

Big stones show color more than small ones. For a cool, white look choose D–F; for vintage warmth, G–H in yellow gold looks beautiful and saves money.

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

How much is a 4 carat lab grown diamond?

Priced 4 carat stones at Culture Carats start at $1,047, with a median of about $1,780. D–F, VS stones sit around $1,590.

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 4 carat lab grown diamonds.

How big is a 4 carat lab grown diamond?

A 4 carat round brilliant is about 10.1 to 10.3 mm across.

Which color is best for a 4 carat stone?

Big stones show color more than small ones. Choose D to F for a cool white look, or G to H in yellow gold for vintage warmth.

What setting suits a 4 carat diamond?

At this size the stone is the design. Think about setting height and prong style early; our team can match a setting to your stone.

Are 4 carat lab diamonds certified?

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