How much does a 3.00 to 4.99ct H SI1 lab grown emerald diamond cost?

As of October 2026, 3.00 to 4.99ct H SI1 lab grown emerald diamonds typically cost £702 GBP to £2,821 GBP, with a median price of £1,096 GBP. There are currently 20 diamonds matching this specification available across retailers.

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

About 12% of these diamonds are available at multiple retailers, with an average price spread of 112%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct H SI1 Lab Grown Emerald

Quick answer

As of October 2026, there are 20 lab grown emerald diamonds with H colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £702 GBP to £2,821 GBP, with a median of £1,096 GBP. At least 24 retailers stock this exact specification, and 12% of the stones appear at more than one of them, with an average price spread of 112%. Half of all listings fall between £265 GBP and £711 GBP per carat. The same specification in natural form lists at a median of about £9,298 GBP per carat. Over the last 30 days the median price moved +9.2% and the number of listings moved +10.3%.

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

£243 GBP

Highest Price

£5,909 GBP

Average Price

£1,495 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

11.9%

Price Spread

111.8%

30-Day Price Trend

+9.2%

30-Day Supply Change

+10.3%

Volatility (30d)

0.03

Price Range

Price per carat distribution across retailers

$531/ct

10th Percentile

$293

Median

$531

90th Percentile

$1,240

Score Distribution

76 diamonds scored across 3 quality tiers

Very Good

10 (13.2%)

Good

25 (32.9%)

Average

41 (53.9%)

Find Your Diamond

Search 20 H SI1 emerald diamonds and compare prices.

Search Diamonds

Consider Instead

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

H SI2SI2 inclusions are not visible without magnification

Save 46%

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