How much does a 1.00 to 1.49ct I SI2 lab grown emerald diamond cost?

As of October 2026, 1.00 to 1.49ct I SI2 lab grown emerald diamonds typically cost £498 GBP to £610 GBP, with a median price of £526 GBP. There are currently 24 diamonds matching this specification available across retailers.

Where can I find the best price on a I SI2 emerald diamond?

About 76% of these diamonds are available at multiple retailers, with an average price spread of 106%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct I SI2 Lab Grown Emerald

Quick answer

As of October 2026, there are 24 lab grown emerald diamonds with I colour and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £498 GBP to £610 GBP, with a median of £526 GBP. At least 17 retailers stock this exact specification, and 76% of the stones appear at more than one of them, with an average price spread of 106%. Half of all listings fall between £462 GBP and £1,221 GBP per carat. The same specification in natural form lists at a median of about £1,764 GBP per carat. Over the last 30 days the median price moved +1.3% and the number of listings moved -0.2%.

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

£206 GBP

Highest Price

£3,020 GBP

Average Price

£541 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

75.5%

Price Spread

105.6%

30-Day Price Trend

+1.3%

30-Day Supply Change

-0.2%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$957/ct

10th Percentile

$496

Median

$957

90th Percentile

$2,846

Score Distribution

24 diamonds scored across 3 quality tiers

Excellent

17 (70.8%)

Very Good

4 (16.7%)

Good

3 (12.5%)

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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