How much does a 1.50 to 1.99ct D SI1 lab grown radiant diamond cost?

As of November 2026, 1.50 to 1.99ct D SI1 lab grown radiant diamonds typically cost €189 EUR to €1,048 EUR, with a median price of €601 EUR. There are currently 104 diamonds matching this specification available across retailers.

Where can I find the best price on a D SI1 radiant diamond?

About 27% of these diamonds are available at multiple retailers, with an average price spread of 95%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct D SI1 Lab Grown Radiant

Quick answer

As of November 2026, there are 104 lab grown radiant diamonds with D color and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run €189 EUR to €1,048 EUR, with a median of €601 EUR. At least 36 retailers stock this exact specification, and 27% of the stones appear at more than one of them, with an average price spread of 95%. Half of all listings fall between €201 EUR and €534 EUR per carat. The same specification in natural form lists at a median of about €5,235 EUR per carat. Over the last 30 days the median price moved +8.3% and the number of listings moved +11.6%.

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. Radiant lab grown stones in the index: 474 USD per carat, -2.1% 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: November 2026

Available

104

Lowest Price

€139 EUR

Highest Price

€2,710 EUR

Average Price

€660 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

27.4%

Price Spread

94.6%

30-Day Price Trend

+8.3%

30-Day Supply Change

+11.6%

Volatility (30d)

0.06

Price Range

Price per carat distribution across retailers

$394/ct

10th Percentile

$139

Median

$394

90th Percentile

$806

Score Distribution

168 diamonds scored across 4 quality tiers

Excellent

33 (19.6%)

Very Good

28 (16.7%)

Good

55 (32.7%)

Average

52 (31.0%)

Find Your Diamond

Search 104 D SI1 radiant diamonds and compare prices.

Search Diamonds

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