How much does a 0.75 to 0.99ct H SI1 lab grown emerald diamond cost?

As of October 2026, 0.75 to 0.99ct H SI1 lab grown emerald diamonds typically cost £208 GBP to £3,063 GBP, with a median price of £497 GBP. There are currently 18 diamonds matching this specification available across retailers.

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

About 34% of these diamonds are available at multiple retailers, with an average price spread of 144%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct H SI1 Lab Grown Emerald

Quick answer

As of October 2026, there are 18 lab grown emerald diamonds with H colour and SI1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run £208 GBP to £3,063 GBP, with a median of £497 GBP. At least 20 retailers stock this exact specification, and 34% of the stones appear at more than one of them, with an average price spread of 144%. Half of all listings fall between £519 GBP and £1,536 GBP per carat. The same specification in natural form lists at a median of about £1,073 GBP per carat. Over the last 30 days the median price moved +4.0% and the number of listings moved 0.0%.

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

£151 GBP

Highest Price

£3,496 GBP

Average Price

£1,037 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

34.4%

Price Spread

143.7%

30-Day Price Trend

+4.0%

30-Day Supply Change

0.0%

Volatility (30d)

0.03

Price Range

Price per carat distribution across retailers

$941/ct

10th Percentile

$439

Median

$941

90th Percentile

$3,293

Score Distribution

37 diamonds scored across 4 quality tiers

Excellent

4 (10.8%)

Very Good

15 (40.5%)

Good

2 (5.4%)

Average

16 (43.2%)

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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