How much does a 0.20 to 0.49ct G VS1 natural marquise diamond cost?

As of October 2026, 0.20 to 0.49ct G VS1 natural marquise diamonds typically cost £211 GBP to £639 GBP, with a median price of £369 GBP. There are currently 712 diamonds matching this specification available across retailers.

Where can I find the best price on a G VS1 marquise diamond?

About 42% of these diamonds are available at multiple retailers, with an average price spread of 47%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct G VS1 Natural Marquise

Quick answer

As of October 2026, there are 712 natural marquise diamonds with G colour and VS1 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run £211 GBP to £639 GBP, with a median of £369 GBP. At least 21 retailers stock this exact specification, and 42% of the stones appear at more than one of them, with an average price spread of 47%. Half of all listings fall between £733 GBP and £1,259 GBP per carat. The same specification in lab grown form lists at a median of about £407 GBP per carat. Over the last 30 days the median price moved +1.3% and the number of listings moved +4.7%.

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. Marquise natural stones in the index: 2,268 USD per carat, +10.8% 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

712

Lowest Price

£119 GBP

Highest Price

£1,295 GBP

Average Price

£403 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

42.0%

Price Spread

46.6%

30-Day Price Trend

+1.3%

30-Day Supply Change

+4.7%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$1,511/ct

10th Percentile

$870

Median

$1,511

90th Percentile

$1,838

Score Distribution

1.4K diamonds scored across 4 quality tiers

Excellent

237 (16.7%)

Very Good

409 (28.8%)

Good

312 (22.0%)

Average

462 (32.5%)

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Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

H VS1H colour is visually identical to G to the naked eye

Save 4%

Lab-Grown G VS1Same specifications, lab-grown origin

Save 70%

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