How much does a 5.00ct+ D SI2 lab grown round diamond cost?

As of October 2026, 5.00ct+ D SI2 lab grown round diamonds typically cost $1,859 USD to $5,519 USD, with a median price of $4,091 USD. There are currently 4 diamonds matching this specification available across retailers.

Where can I find the best price on a D SI2 round diamond?

About 33% of these diamonds are available at multiple retailers, with an average price spread of 44%. A comparison tool like Carat Hunter lets you see all the prices side by side.

5.00ct+ D SI2 Lab Grown Round

Quick answer

As of October 2026, there are 4 lab grown round diamonds with D color and SI2 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $1,859 USD to $5,519 USD, with a median of $4,091 USD. At least 16 retailers stock this exact specification, and 33% of the stones appear at more than one of them, with an average price spread of 44%. Half of all listings fall between $236 USD and $381 USD per carat. The same specification in natural form lists at a median of about $20,239 USD per carat. Over the last 30 days the median price moved -5.3% and the number of listings moved +8.5%.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, September 2026: natural diamonds at 2,335 USD per carat and lab-grown at 443 USD per carat, a natural to lab ratio of 5.3 to 1. Round lab grown stones in the index: 414 USD per carat, -5.0% month on month. See the full index release

Figures come from current listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: October 2026

Available

Lowest Price

$1,498 USD

Highest Price

$8,248 USD

Average Price

$3,856 USD

Market Intelligence

Retailers Selling

Cross Retailer %

33.3%

Price Spread

44.4%

30-Day Price Trend

-5.3%

30-Day Supply Change

+8.5%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$326/ct

10th Percentile

$219

Median

$326

90th Percentile

$607

Score Distribution

8 diamonds scored across 3 quality tiers

Very Good

1 (12.5%)

Good

4 (50.0%)

Average

3 (37.5%)

Find Your Diamond

Search 4 D SI2 round diamonds and compare prices.

Search Diamonds

Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

D I1I1 inclusions are not visible without magnification

Save 50%

Related Specifications

D IF D VVS1 D VVS2 D VS1 D VS2 D SI1 E IF E VVS1 E VVS2 E VS1 E VS2 E SI1 F IF F VVS1 F VVS2 F VS1 F VS2 F SI1 G IF G VVS1 G VVS2 G VS1 G VS2 G SI1 H IF H VVS1 H VVS2 H VS1 H VS2 H SI1 I IF I VVS1 I VVS2 I VS1 I VS2 I SI1