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

As of November 2026, 1.50 to 1.99ct D SI1 lab grown heart diamonds typically cost €207 EUR to €1,542 EUR, with a median price of €549 EUR. There are currently 27 diamonds matching this specification available across retailers.

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

About 42% of these diamonds are available at multiple retailers, with an average price spread of 106%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct D SI1 Lab Grown Heart

Quick answer

As of November 2026, there are 27 lab grown heart diamonds with D color and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run €207 EUR to €1,542 EUR, with a median of €549 EUR. At least 35 retailers stock this exact specification, and 42% of the stones appear at more than one of them, with an average price spread of 106%. Half of all listings fall between €189 EUR and €509 EUR per carat. The same specification in natural form lists at a median of about €4,327 EUR per carat. Over the last 30 days the median price moved -9.9% and the number of listings moved +29.6%.

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. Heart lab grown stones in the index: 421 USD per carat, -1.8% 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

Lowest Price

€183 EUR

Highest Price

€2,291 EUR

Average Price

€762 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

42.1%

Price Spread

105.8%

30-Day Price Trend

-9.9%

30-Day Supply Change

+29.6%

Volatility (30d)

0.04

Price Range

Price per carat distribution across retailers

$338/ct

10th Percentile

$158

Median

$338

90th Percentile

$794

Score Distribution

47 diamonds scored across 4 quality tiers

Excellent

12 (25.5%)

Very Good

8 (17.0%)

Good

10 (21.3%)

Average

17 (36.2%)

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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