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

As of October 2026, 0.75 to 0.99ct H SI1 natural emerald diamonds typically cost £636 GBP to £1,990 GBP, with a median price of £993 GBP. There are currently 153 diamonds matching this specification available across retailers.

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

About 30% of these diamonds are available at multiple retailers, with an average price spread of 59%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct H SI1 Natural Emerald

Quick answer

As of October 2026, there are 153 natural emerald diamonds with H colour and SI1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run £636 GBP to £1,990 GBP, with a median of £993 GBP. At least 59 retailers stock this exact specification, and 30% of the stones appear at more than one of them, with an average price spread of 59%. Half of all listings fall between £881 GBP and £1,513 GBP per carat. The same specification in lab grown form lists at a median of about £707 GBP per carat. Over the last 30 days the median price moved -2.1% and the number of listings moved +5.9%.

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

153

Lowest Price

£489 GBP

Highest Price

£3,249 GBP

Average Price

£1,163 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

30.4%

Price Spread

59.0%

30-Day Price Trend

-2.1%

30-Day Supply Change

+5.9%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$1,426/ct

10th Percentile

$1,037

Median

$1,426

90th Percentile

$2,951

Score Distribution

427 diamonds scored across 4 quality tiers

Excellent

57 (13.3%)

Very Good

92 (21.5%)

Good

95 (22.2%)

Average

183 (42.9%)

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Consider Instead

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

H SI2SI2 inclusions are not visible without magnification

Save 4%

Lab-Grown H SI1Same specifications, lab-grown origin

Save 34%

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