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

As of October 2026, 0.75 to 0.99ct J SI1 natural emerald diamonds typically cost £527 GBP to £1,373 GBP, with a median price of £743 GBP. There are currently 76 diamonds matching this specification available across retailers.

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

About 28% of these diamonds are available at multiple retailers, with an average price spread of 48%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct J SI1 Natural Emerald

Quick answer

As of October 2026, there are 76 natural emerald diamonds with J colour and SI1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run £527 GBP to £1,373 GBP, with a median of £743 GBP. At least 51 retailers stock this exact specification, and 28% of the stones appear at more than one of them, with an average price spread of 48%. Half of all listings fall between £696 GBP and £1,109 GBP per carat. The same specification in lab grown form lists at a median of about £634 GBP per carat. Over the last 30 days the median price moved +0.4% and the number of listings moved +5.0%.

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 natural stones in the index: 2,278 USD per carat, +6.2% 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

£371 GBP

Highest Price

£2,385 GBP

Average Price

£848 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

27.9%

Price Spread

47.7%

30-Day Price Trend

+0.4%

30-Day Supply Change

+5.0%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,154/ct

10th Percentile

$783

Median

$1,154

90th Percentile

$2,163

Score Distribution

244 diamonds scored across 4 quality tiers

Excellent

29 (11.9%)

Very Good

44 (18.0%)

Good

44 (18.0%)

Average

127 (52.0%)

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Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

Lab-Grown J SI1Same specifications, lab-grown origin

Save 27%

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