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

As of November 2026, 1.00 to 1.49ct H SI1 natural marquise diamonds typically cost €2,209 EUR to €5,517 EUR, with a median price of €3,123 EUR. There are currently 268 diamonds matching this specification available across retailers.

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

About 38% of these diamonds are available at multiple retailers, with an average price spread of 46%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct H SI1 Natural Marquise

Quick answer

As of November 2026, there are 268 natural marquise diamonds with H color and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run €2,209 EUR to €5,517 EUR, with a median of €3,123 EUR. At least 62 retailers stock this exact specification, and 38% of the stones appear at more than one of them, with an average price spread of 46%. Half of all listings fall between €2,435 EUR and €3,796 EUR per carat. The same specification in lab grown form lists at a median of about €758 EUR per carat. Over the last 30 days the median price moved +0.4% and the number of listings moved +17.7%.

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: November 2026

Available

268

Lowest Price

€1,531 EUR

Highest Price

€12,438 EUR

Average Price

€3,592 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

38.3%

Price Spread

45.9%

30-Day Price Trend

+0.4%

30-Day Supply Change

+17.7%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$3,315/ct

10th Percentile

$2,240

Median

$3,315

90th Percentile

$5,272

Score Distribution

599 diamonds scored across 4 quality tiers

Excellent

51 (8.5%)

Very Good

163 (27.2%)

Good

165 (27.5%)

Average

220 (36.7%)

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Consider Instead

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

H SI2SI2 inclusions are not visible without magnification

Save 18%

Lab-Grown H SI1Same specifications, lab-grown origin

Save 71%

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