How much does a 1.00 to 1.49ct H SI1 natural asscher diamond cost?

As of October 2026, 1.00 to 1.49ct H SI1 natural asscher diamonds typically cost £1,243 GBP to £3,556 GBP, with a median price of £2,036 GBP. There are currently 98 diamonds matching this specification available across retailers.

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

About 34% of these diamonds are available at multiple retailers, with an average price spread of 58%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct H SI1 Natural Asscher

Quick answer

As of October 2026, there are 98 natural asscher diamonds with H colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £1,243 GBP to £3,556 GBP, with a median of £2,036 GBP. At least 58 retailers stock this exact specification, and 34% of the stones appear at more than one of them, with an average price spread of 58%. Half of all listings fall between £1,280 GBP and £2,236 GBP per carat. The same specification in lab grown form lists at a median of about £791 GBP per carat. Over the last 30 days the median price moved -1.2% and the number of listings moved +5.1%.

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

£659 GBP

Highest Price

£5,297 GBP

Average Price

£2,269 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

33.6%

Price Spread

58.4%

30-Day Price Trend

-1.2%

30-Day Supply Change

+5.1%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$2,194/ct

10th Percentile

$1,456

Median

$2,194

90th Percentile

$4,017

Score Distribution

258 diamonds scored across 4 quality tiers

Excellent

27 (10.5%)

Very Good

41 (15.9%)

Good

46 (17.8%)

Average

144 (55.8%)

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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

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Lab-Grown H SI1Same specifications, lab-grown origin

Save 52%

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