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 HK$19,251 HKD to HK$48,462 HKD, with a median price of HK$27,347 HKD. There are currently 266 diamonds matching this specification available across retailers.

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

About 39% 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 266 natural marquise diamonds with H colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run HK$19,251 HKD to HK$48,462 HKD, with a median of HK$27,347 HKD. At least 62 retailers stock this exact specification, and 39% of the stones appear at more than one of them, with an average price spread of 46%. Half of all listings fall between HK$21,365 HKD and HK$33,377 HKD per carat. The same specification in lab grown form lists at a median of about HK$6,629 HKD per carat. Over the last 30 days the median price moved +0.5% and the number of listings moved +17.6%.

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

266

Lowest Price

HK$13,416 HKD

Highest Price

HK$109,024 HKD

Average Price

HK$31,475 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

38.6%

Price Spread

46.2%

30-Day Price Trend

+0.5%

30-Day Supply Change

+17.6%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$3,317/ct

10th Percentile

$2,242

Median

$3,317

90th Percentile

$5,276

Score Distribution

594 diamonds scored across 4 quality tiers

Excellent

51 (8.6%)

Very Good

162 (27.3%)

Good

166 (27.9%)

Average

215 (36.2%)

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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