How much does a 5.00ct+ D SI1 lab grown oval diamond cost?

As of October 2026, 5.00ct+ D SI1 lab grown oval diamonds typically cost HK$5,968 HKD to HK$36,964 HKD, with a median price of HK$11,376 HKD. There are currently 13 diamonds matching this specification available across retailers.

Where can I find the best price on a D SI1 oval diamond?

About 59% of these diamonds are available at multiple retailers, with an average price spread of 124%. A comparison tool like Carat Hunter lets you see all the prices side by side.

5.00ct+ D SI1 Lab Grown Oval

Quick answer

As of October 2026, there are 13 lab grown oval diamonds with D colour and SI1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run HK$5,968 HKD to HK$36,964 HKD, with a median of HK$11,376 HKD. At least 25 retailers stock this exact specification, and 59% of the stones appear at more than one of them, with an average price spread of 124%. Half of all listings fall between HK$1,967 HKD and HK$5,531 HKD per carat. The same specification in natural form lists at a median of about HK$215,845 HKD per carat. Over the last 30 days the median price moved +6.8% and the number of listings moved +124.7%.

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 lab grown stones in the index: 453 USD per carat, -7.4% 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$5,336 HKD

Highest Price

HK$84,270 HKD

Average Price

HK$18,112 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

58.6%

Price Spread

123.5%

30-Day Price Trend

+6.8%

30-Day Supply Change

+124.7%

Volatility (30d)

0.17

Price Range

Price per carat distribution across retailers

$368/ct

10th Percentile

$179

Median

$368

90th Percentile

$1,051

Score Distribution

32 diamonds scored across 4 quality tiers

Excellent

10 (31.3%)

Very Good

6 (18.8%)

Good

7 (21.9%)

Average

9 (28.1%)

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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