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

As of November 2026, 1.00 to 1.49ct F SI1 natural marquise diamonds typically cost $3,683 SGD to $9,261 SGD, with a median price of $5,183 SGD. There are currently 290 diamonds matching this specification available across retailers.

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

About 35% of these diamonds are available at multiple retailers, with an average price spread of 39%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct F SI1 Natural Marquise

Quick answer

As of November 2026, there are 290 natural marquise diamonds with F colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $3,683 SGD to $9,261 SGD, with a median of $5,183 SGD. At least 64 retailers stock this exact specification, and 35% of the stones appear at more than one of them, with an average price spread of 39%. Half of all listings fall between $4,247 SGD and $6,208 SGD per carat. The same specification in lab grown form lists at a median of about $519 SGD per carat. Over the last 30 days the median price moved -0.0% and the number of listings moved +13.3%.

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

290

Lowest Price

$2,460 SGD

Highest Price

$21,397 SGD

Average Price

$6,052 SGD

Market Intelligence

Retailers Selling

Cross Retailer %

35.3%

Price Spread

39.4%

30-Day Price Trend

-0.0%

30-Day Supply Change

+13.3%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$3,888/ct

10th Percentile

$2,912

Median

$3,888

90th Percentile

$5,981

Score Distribution

666 diamonds scored across 4 quality tiers

Excellent

56 (8.4%)

Very Good

150 (22.5%)

Good

171 (25.7%)

Average

289 (43.4%)

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Consider Instead

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

F SI2SI2 inclusions are not visible without magnification

Save 23%

Lab-Grown F SI1Same specifications, lab-grown origin

Save 89%

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