How much does a 1.00 to 1.49ct J SI2 natural marquise diamond cost?

As of November 2026, 1.00 to 1.49ct J SI2 natural marquise diamonds typically cost €1,123 EUR to €4,057 EUR, with a median price of €2,073 EUR. There are currently 312 diamonds matching this specification available across retailers.

Where can I find the best price on a J SI2 marquise diamond?

About 38% of these diamonds are available at multiple retailers, with an average price spread of 57%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct J SI2 Natural Marquise

Quick answer

As of November 2026, there are 312 natural marquise diamonds with J colour and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run €1,123 EUR to €4,057 EUR, with a median of €2,073 EUR. At least 53 retailers stock this exact specification, and 38% of the stones appear at more than one of them, with an average price spread of 57%. Half of all listings fall between €1,436 EUR and €2,525 EUR per carat. The same specification in lab grown form lists at a median of about €885 EUR per carat. Over the last 30 days the median price moved +0.0% and the number of listings moved +14.9%.

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

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Marquise natural stones in the index: 2,177 USD per carat, -4.2% 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

312

Lowest Price

€727 EUR

Highest Price

€9,414 EUR

Average Price

€2,347 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

37.8%

Price Spread

56.5%

30-Day Price Trend

+0.0%

30-Day Supply Change

+14.9%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$2,161/ct

10th Percentile

$1,271

Median

$2,161

90th Percentile

$3,763

Score Distribution

757 diamonds scored across 4 quality tiers

Excellent

96 (12.7%)

Very Good

201 (26.6%)

Good

176 (23.2%)

Average

284 (37.5%)

Find Your Diamond

Search 312 J SI2 marquise diamonds and compare prices.

Search Diamonds

Consider Instead

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

Lab-Grown J SI2Same specifications, lab-grown origin

Save 54%

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