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

As of September 2026, 5.00ct+ D SI1 lab grown round diamonds typically cost HK$5,891 HKD to HK$90,042 HKD, with a median price of HK$15,835 HKD. There are currently 42 diamonds matching this specification available across retailers.

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

Compare prices across retailers on Carat Hunter to see all your options.

5.00ct+ D SI1 Lab Grown Round

Quick answer

As of September 2026, there are 42 lab grown round diamonds with D colour and SI1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run HK$5,891 HKD to HK$90,042 HKD, with a median of HK$15,835 HKD. At least 21 retailers stock this exact specification. Half of all listings fall between HK$2,209 HKD and HK$6,277 HKD per carat. The same specification in natural form lists at a median of about HK$277,537 HKD per carat.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Round lab grown stones in the index: 438 USD per carat, -14.1% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

Lowest Price

HK$4,177 HKD

Highest Price

HK$465,769 HKD

Average Price

HK$31,343 HKD

Market Intelligence

Retailers Selling

Price Spread

128.6%

Price Range

Price per carat distribution across retailers

$411/ct

10th Percentile

$217

Median

$411

90th Percentile

$1,096

Score Distribution

42 diamonds scored across 4 quality tiers

Excellent

10 (23.8%)

Very Good

10 (23.8%)

Good

15 (35.7%)

Average

7 (16.7%)

Find Your Diamond

Search 42 D SI1 round diamonds and compare prices.

Search Diamonds

Consider Instead

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

D SI2SI2 inclusions are not visible without magnification

Save 12%

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