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

As of November 2026, 0.75 to 0.99ct J SI1 lab grown emerald diamonds typically cost €191 EUR to €508 EUR, with a median price of €483 EUR. There are currently 13 diamonds matching this specification available across retailers.

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

About 79% of these diamonds are available at multiple retailers, with an average price spread of 99%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct J SI1 Lab Grown Emerald

Quick answer

As of November 2026, there are 13 lab grown emerald diamonds with J color and SI1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run €191 EUR to €508 EUR, with a median of €483 EUR. At least 19 retailers stock this exact specification, and 79% of the stones appear at more than one of them, with an average price spread of 99%. Half of all listings fall between €525 EUR and €1,270 EUR per carat. The same specification in natural form lists at a median of about €1,031 EUR per carat. Over the last 30 days the median price moved -2.0% and the number of listings moved -1.0%.

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: November 2026

Available

Lowest Price

€143 EUR

Highest Price

€2,995 EUR

Average Price

€397 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

79.0%

Price Spread

98.5%

30-Day Price Trend

-2.0%

30-Day Supply Change

-1.0%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$845/ct

10th Percentile

$350

Median

$845

90th Percentile

$2,458

Score Distribution

14 diamonds scored across 2 quality tiers

Excellent

11 (78.6%)

Very Good

3 (21.4%)

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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