How much does a 5.00ct+ H SI1 lab grown emerald diamond cost?

As of October 2026, 5.00ct+ H SI1 lab grown emerald diamonds typically cost £853 GBP to £8,304 GBP, with a median price of £1,793 GBP. There are currently 23 diamonds matching this specification available across retailers.

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

About 75% of these diamonds are available at multiple retailers, with an average price spread of 79%. A comparison tool like Carat Hunter lets you see all the prices side by side.

5.00ct+ H SI1 Lab Grown Emerald

Quick answer

As of October 2026, there are 23 lab grown emerald diamonds with H colour and SI1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run £853 GBP to £8,304 GBP, with a median of £1,793 GBP. At least 16 retailers stock this exact specification, and 75% of the stones appear at more than one of them, with an average price spread of 79%. Half of all listings fall between £181 GBP and £398 GBP per carat. The same specification in natural form lists at a median of about £13,852 GBP per carat. Over the last 30 days the median price moved -51.6% and the number of listings moved +50.8%.

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. Emerald lab grown stones in the index: 451 USD per carat, -8.3% 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

£412 GBP

Highest Price

£18,516 GBP

Average Price

£2,858 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

75.0%

Price Spread

79.3%

30-Day Price Trend

-51.6%

30-Day Supply Change

+50.8%

Volatility (30d)

0.17

Price Range

Price per carat distribution across retailers

$367/ct

10th Percentile

$229

Median

$367

90th Percentile

$1,057

Score Distribution

37 diamonds scored across 4 quality tiers

Excellent

10 (27.0%)

Very Good

9 (24.3%)

Good

12 (32.4%)

Average

6 (16.2%)

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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