How much does a 1.00 to 1.49ct D SI1 natural marquise diamond cost?

As of October 2026, 1.00 to 1.49ct D SI1 natural marquise diamonds typically cost €2,735 EUR to €6,912 EUR, with a median price of €3,779 EUR. There are currently 402 diamonds matching this specification available across retailers.

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

About 40% of these diamonds are available at multiple retailers, with an average price spread of 41%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct D SI1 Natural Marquise

Quick answer

As of October 2026, there are 402 natural marquise diamonds with D color and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run €2,735 EUR to €6,912 EUR, with a median of €3,779 EUR. At least 62 retailers stock this exact specification, and 40% of the stones appear at more than one of them, with an average price spread of 41%. Half of all listings fall between €3,261 EUR and €4,837 EUR per carat. The same specification in lab grown form lists at a median of about €346 EUR per carat. Over the last 30 days the median price moved +1.0% and the number of listings moved +14.7%.

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. Marquise natural stones in the index: 2,268 USD per carat, +10.8% 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: October 2026

Available

402

Lowest Price

€1,879 EUR

Highest Price

€14,850 EUR

Average Price

€4,363 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

40.0%

Price Spread

41.2%

30-Day Price Trend

+1.0%

30-Day Supply Change

+14.7%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$4,270/ct

10th Percentile

$3,174

Median

$4,270

90th Percentile

$6,660

Score Distribution

810 diamonds scored across 4 quality tiers

Excellent

120 (14.8%)

Very Good

233 (28.8%)

Good

222 (27.4%)

Average

235 (29.0%)

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Consider Instead

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

D SI2SI2 inclusions are not visible without magnification

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Lab-Grown D SI1Same specifications, lab-grown origin

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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