How much does a 0.20 to 0.49ct G SI1 lab grown emerald diamond cost?

As of October 2026, 0.20 to 0.49ct G SI1 lab grown emerald diamonds typically cost £54 GBP to £257 GBP, with a median price of £155 GBP. There are currently 10 diamonds matching this specification available across retailers.

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

Compare prices across retailers on Carat Hunter to see all your options.

0.20 to 0.49ct G SI1 Lab Grown Emerald

Quick answer

As of October 2026, there are 10 lab grown emerald diamonds with G colour and SI1 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run £54 GBP to £257 GBP, with a median of £155 GBP. The same specification in natural form lists at a median of about £938 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. Emerald lab grown stones in the index: 451 USD per carat, -8.3% 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

£53 GBP

Highest Price

£626 GBP

Average Price

£150 GBP

Score Distribution

13 diamonds scored across 4 quality tiers

Excellent

3 (23.1%)

Very Good

2 (15.4%)

Good

5 (38.5%)

Average

3 (23.1%)

Find Your Diamond

Search 10 G SI1 emerald diamonds and compare prices.

Search Diamonds

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