How much does a 1.50 to 1.99ct I SI1 lab grown asscher diamond cost?

As of October 2026, 1.50 to 1.99ct I SI1 lab grown asscher diamonds typically cost £1,095 GBP to £7,650 GBP, with a median price of £3,895 GBP. There are currently 2 diamonds matching this specification available across retailers.

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

About 5% of these diamonds are available at multiple retailers, with an average price spread of 290%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct I SI1 Lab Grown Asscher

Quick answer

As of October 2026, there are 2 lab grown asscher diamonds with I colour and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run £1,095 GBP to £7,650 GBP, with a median of £3,895 GBP. At least 5 retailers stock this exact specification, and 5% of the stones appear at more than one of them, with an average price spread of 290%. Half of all listings fall between £318 GBP and £2,296 GBP per carat. The same specification in natural form lists at a median of about £2,776 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

£1,039 GBP

Highest Price

£8,116 GBP

Average Price

£4,236 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

4.8%

Price Spread

290.1%

Price Range

Price per carat distribution across retailers

$906/ct

10th Percentile

$340

Median

$906

90th Percentile

$6,153

Score Distribution

4 diamonds scored across 2 quality tiers

Good

2 (50.0%)

Average

2 (50.0%)

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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