How much does a 5.00ct+ D SI2 natural oval diamond cost?

As of October 2026, 5.00ct+ D SI2 natural oval diamonds typically cost HK$558,276 HKD to HK$1,741,980 HKD, with a median price of HK$850,091 HKD. There are currently 24 diamonds matching this specification available across retailers.

Where can I find the best price on a D SI2 oval diamond?

About 28% of these diamonds are available at multiple retailers, with an average price spread of 24%. A comparison tool like Carat Hunter lets you see all the prices side by side.

5.00ct+ D SI2 Natural Oval

Quick answer

As of October 2026, there are 24 natural oval diamonds with D colour and SI2 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run HK$558,276 HKD to HK$1,741,980 HKD, with a median of HK$850,091 HKD. At least 33 retailers stock this exact specification, and 28% of the stones appear at more than one of them, with an average price spread of 24%. Half of all listings fall between HK$128,206 HKD and HK$162,870 HKD per carat. Over the last 30 days the median price moved -0.1% and the number of listings moved +8.7%.

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. Oval natural stones in the index: 2,655 USD per carat, +10.2% 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: October 2026

Available

Lowest Price

HK$516,529 HKD

Highest Price

HK$2,411,120 HKD

Average Price

HK$1,007,046 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

28.0%

Price Spread

23.6%

30-Day Price Trend

-0.1%

30-Day Supply Change

+8.7%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$18,687/ct

10th Percentile

$13,267

Median

$18,687

90th Percentile

$25,207

Score Distribution

65 diamonds scored across 4 quality tiers

Excellent

15 (23.1%)

Very Good

14 (21.5%)

Good

19 (29.2%)

Average

17 (26.2%)

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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