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

As of October 2026, 1.00 to 1.49ct H SI1 lab grown asscher diamonds typically cost £325 GBP to £3,596 GBP, with a median price of £807 GBP. There are currently 10 diamonds matching this specification available across retailers.

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

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1.00 to 1.49ct H SI1 Lab Grown Asscher

Quick answer

As of October 2026, there are 10 lab grown asscher diamonds with H colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £325 GBP to £3,596 GBP, with a median of £807 GBP. At least 4 retailers stock this exact specification. Half of all listings fall between £486 GBP and £2,757 GBP per carat. The same specification in natural form lists at a median of about £1,885 GBP per carat.

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 lab grown stones in the index: 470 USD per carat, -4.3% 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

£229 GBP

Highest Price

£5,806 GBP

Average Price

£1,767 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

0.0%

Price Spread

285.4%

Price Range

Price per carat distribution across retailers

$1,059/ct

10th Percentile

$400

Median

$1,059

90th Percentile

$4,699

Score Distribution

14 diamonds scored across 3 quality tiers

Very Good

3 (21.4%)

Good

6 (42.9%)

Average

5 (35.7%)

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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