How much does a 1.50 to 1.99ct K SI1 natural emerald diamond cost?

As of November 6, 2026, 1.50 to 1.99ct K SI1 natural emerald diamonds typically cost £1,636 GBP to £4,163 GBP, with a median price of £2,264 GBP. There are currently 210 diamonds matching this specification available across retailers.

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

About 42% of these diamonds are available at multiple retailers, with an average price spread of 43%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct K SI1 Natural Emerald

Quick answer

As of November 6, 2026, there are 210 natural emerald diamonds with K colour and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run £1,636 GBP to £4,163 GBP, with a median of £2,264 GBP. Half of all listings fall between £1,210 GBP and £1,852 GBP per carat. The same specification in lab grown form lists at a median of about £449 GBP per carat. Over the last 30 days the median price moved +0.5% and the number of listings moved +13.9%.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Emerald natural stones in the index: 2,109 USD per carat, -8.1% month on month. See the full index release

Figures come from current listings across more than 125 retailers. The index is a monthly release.

Last updated: November 6, 2026

Available

210

Lowest Price

£1,153 GBP

Highest Price

£9,468 GBP

Average Price

£2,609 GBP

Market Intelligence

Cross Retailer %

42.4%

Price Spread

43.3%

30-Day Price Trend

+0.5%

30-Day Supply Change

+13.9%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$1,994/ct

10th Percentile

$1,468

Median

$1,994

90th Percentile

$3,671

Score Distribution

210 diamonds scored across 4 quality tiers

Excellent

48 (22.9%)

Very Good

60 (28.6%)

Good

54 (25.7%)

Average

48 (22.9%)

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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