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

As of October 2026, 0.75 to 0.99ct D SI1 lab grown emerald diamonds typically cost £114 GBP to £741 GBP, with a median price of £330 GBP. There are currently 66 diamonds matching this specification available across retailers.

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

About 26% of these diamonds are available at multiple retailers, with an average price spread of 95%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct D SI1 Lab Grown Emerald

Quick answer

As of October 2026, there are 66 lab grown emerald diamonds with D colour and SI1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run £114 GBP to £741 GBP, with a median of £330 GBP. At least 39 retailers stock this exact specification, and 26% of the stones appear at more than one of them, with an average price spread of 95%. Half of all listings fall between £205 GBP and £530 GBP per carat. The same specification in natural form lists at a median of about £1,463 GBP per carat. Over the last 30 days the median price moved -1.7% and the number of listings moved +11.0%.

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

£72 GBP

Highest Price

£1,357 GBP

Average Price

£429 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

26.0%

Price Spread

95.2%

30-Day Price Trend

-1.7%

30-Day Supply Change

+11.0%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$456/ct

10th Percentile

$169

Median

$456

90th Percentile

$1,117

Score Distribution

177 diamonds scored across 4 quality tiers

Excellent

31 (17.5%)

Very Good

24 (13.6%)

Good

28 (15.8%)

Average

94 (53.1%)

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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