How much does a 3.00 to 4.99ct H SI1 natural asscher diamond cost?

As of October 2026, 3.00 to 4.99ct H SI1 natural asscher diamonds typically cost £17,769 GBP to £37,487 GBP, with a median price of £26,616 GBP. There are currently 21 diamonds matching this specification available across retailers.

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

About 50% of these diamonds are available at multiple retailers, with an average price spread of 32%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct H SI1 Natural Asscher

Quick answer

As of October 2026, there are 21 natural asscher diamonds with H colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £17,769 GBP to £37,487 GBP, with a median of £26,616 GBP. At least 37 retailers stock this exact specification, and 50% of the stones appear at more than one of them, with an average price spread of 32%. Half of all listings fall between £5,152 GBP and £7,117 GBP per carat. The same specification in lab grown form lists at a median of about £759 GBP per carat. Over the last 30 days the median price moved -4.2% and the number of listings moved +14.1%.

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. Asscher natural stones in the index: 2,504 USD per carat, -3.3% 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

£13,173 GBP

Highest Price

£61,653 GBP

Average Price

£27,681 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

50.0%

Price Spread

32.3%

30-Day Price Trend

-4.2%

30-Day Supply Change

+14.1%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$8,152/ct

10th Percentile

$6,326

Median

$8,152

90th Percentile

$11,295

Score Distribution

35 diamonds scored across 4 quality tiers

Excellent

5 (14.3%)

Very Good

9 (25.7%)

Good

10 (28.6%)

Average

11 (31.4%)

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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 28%

Lab-Grown H SI1Same specifications, lab-grown origin

Save 88%

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