How much does a 0.50 to 0.74ct J SI2 lab grown emerald diamond cost?

As of October 2026, 0.50 to 0.74ct J SI2 lab grown emerald diamonds typically cost £242 GBP to £365 GBP, with a median price of £275 GBP. There are currently 7 diamonds matching this specification available across retailers.

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

About 44% of these diamonds are available at multiple retailers, with an average price spread of 83%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct J SI2 Lab Grown Emerald

Quick answer

As of October 2026, there are 7 lab grown emerald diamonds with J colour and SI2 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run £242 GBP to £365 GBP, with a median of £275 GBP. At least 12 retailers stock this exact specification, and 44% of the stones appear at more than one of them, with an average price spread of 83%. Half of all listings fall between £456 GBP and £875 GBP per carat. The same specification in natural form lists at a median of about £777 GBP per carat. Over the last 30 days the median price moved -2.0% and the number of listings moved -1.2%.

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

£148 GBP

Highest Price

£1,340 GBP

Average Price

£296 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

44.4%

Price Spread

83.2%

30-Day Price Trend

-2.0%

30-Day Supply Change

-1.2%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$671/ct

10th Percentile

$523

Median

$671

90th Percentile

$2,086

Score Distribution

9 diamonds scored across 3 quality tiers

Very Good

4 (44.4%)

Good

3 (33.3%)

Average

2 (22.2%)

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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