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

As of September 2026, 1.00 to 1.49ct G SI1 natural asscher diamonds typically cost £1,230 GBP to £4,005 GBP, with a median price of £2,136 GBP. There are currently 281 diamonds matching this specification available across retailers.

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

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1.00 to 1.49ct G SI1 Natural Asscher

Quick answer

As of September 2026, there are 281 natural asscher diamonds with G colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £1,230 GBP to £4,005 GBP, with a median of £2,136 GBP. At least 55 retailers stock this exact specification. Half of all listings fall between £1,614 GBP and £2,761 GBP per carat. The same specification in lab grown form lists at a median of about £350 GBP per carat.

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

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Asscher natural stones in the index: 2,601 USD per carat, +11.1% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

281

Lowest Price

£788 GBP

Highest Price

£6,501 GBP

Average Price

£2,395 GBP