How much does a 1.00 to 1.49ct J SI1 natural emerald diamond cost?

As of October 2026, 1.00 to 1.49ct J SI1 natural emerald diamonds typically cost £886 GBP to £2,730 GBP, with a median price of £1,349 GBP. There are currently 209 diamonds matching this specification available across retailers.

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

About 40% of these diamonds are available at multiple retailers, with an average price spread of 45%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct J SI1 Natural Emerald

Quick answer

As of October 2026, there are 209 natural emerald diamonds with J colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £886 GBP to £2,730 GBP, with a median of £1,349 GBP. At least 57 retailers stock this exact specification, and 40% of the stones appear at more than one of them, with an average price spread of 45%. Half of all listings fall between £975 GBP and £1,507 GBP per carat. The same specification in lab grown form lists at a median of about £787 GBP per carat. Over the last 30 days the median price moved -0.3% and the number of listings moved +7.8%.

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

209

Lowest Price

£644 GBP

Highest Price

£4,552 GBP

Average Price

£1,587 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

39.8%

Price Spread

44.9%

30-Day Price Trend

-0.3%

30-Day Supply Change

+7.8%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$1,575/ct

10th Percentile

$1,111

Median

$1,575

90th Percentile

$2,858

Score Distribution

591 diamonds scored across 4 quality tiers

Excellent

86 (14.6%)

Very Good

126 (21.3%)

Good

103 (17.4%)

Average

276 (46.7%)

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Consider Instead

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

J SI2SI2 inclusions are not visible without magnification

Save 8%

Lab-Grown J SI1Same specifications, lab-grown origin

Save 33%

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