How much does a 0.75 to 0.99ct E SI2 natural marquise diamond cost?

As of October 2026, 0.75 to 0.99ct E SI2 natural marquise diamonds typically cost HK$11,960 HKD to HK$30,381 HKD, with a median price of HK$19,450 HKD. There are currently 97 diamonds matching this specification available across retailers.

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

About 29% of these diamonds are available at multiple retailers, with an average price spread of 50%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct E SI2 Natural Marquise

Quick answer

As of October 2026, there are 97 natural marquise diamonds with E colour and SI2 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run HK$11,960 HKD to HK$30,381 HKD, with a median of HK$19,450 HKD. At least 53 retailers stock this exact specification, and 29% of the stones appear at more than one of them, with an average price spread of 50%. Half of all listings fall between HK$17,201 HKD and HK$27,846 HKD per carat. The same specification in lab grown form lists at a median of about HK$3,661 HKD per carat. Over the last 30 days the median price moved -0.5% and the number of listings moved +0.8%.

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

Lowest Price

HK$7,524 HKD

Highest Price

HK$54,113 HKD

Average Price

HK$20,402 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

28.5%

Price Spread

49.7%

30-Day Price Trend

-0.5%

30-Day Supply Change

+0.8%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$2,730/ct

10th Percentile

$1,877

Median

$2,730

90th Percentile

$4,750

Score Distribution

259 diamonds scored across 4 quality tiers

Excellent

30 (11.6%)

Very Good

62 (23.9%)

Good

47 (18.1%)

Average

120 (46.3%)

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Consider Instead

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

F SI2F colour is visually identical to E to the naked eye

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Lab-Grown E SI2Same specifications, lab-grown origin

Save 83%

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