Skip to content
Independently certified, most by IGI · Laser inscribed
0

1.5 Carat Lab Grown Diamonds

1,138 stones

Filters
Clear all

Buying guide

Choosing 1.5 carat lab grown diamonds.

At 1.5 ct a round measures about 7.3 mm, a clear step up from a 1 carat on the hand. Cut quality starts to show more at this size, so check the cut or polish grade and the light-performance photos before you settle on color and clarity.

A carat and a half is the quiet upgrade: visibly bigger than a one carat on the hand, for a modest step up in price.

1.5 Carat lab grown diamonds at a glance

  • 1,138 colorless stones in stock between 1.50–1.99 ct, mostly emerald, oval, round and radiant
  • Listed prices from $367, median $584 (about $364 per carat)
  • Round face-up size: 7.3–7.4 mm
  • Most stones IGI certified, laser-inscribed, with real photos and 360° video

How to choose a 1.5 carat lab diamond

Elongated shapes like oval and emerald make 1.5 carats look closer to two. If you like step cuts (emerald, asscher), go a grade higher on clarity, as their open facets show inclusions more easily.

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

How much is a 1.5 carat lab grown diamond?

Priced 1.5 carat stones at Culture Carats start at $367, with a median of about $585. D–F color, VS1 or better stones sit around $490–$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 1.5 carat lab grown diamonds.

How big is a 1.5 carat lab grown diamond?

A 1.5 carat round brilliant is about 7.3 to 7.4 mm across, roughly 15% wider than a 1 carat.

Which shapes look biggest at 1.5 carats?

Ovals, pears and emerald cuts spread the weight over a longer outline, so they can look close to two carats on the hand.

What clarity do I need for a 1.5 carat step cut?

Emerald and Asscher cuts have open facets that show inclusions, so choose VS1 or better and check the 360° video.

Are 1.5 carat lab diamonds certified?

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