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

As of November 2026, 0.20 to 0.49ct G IF natural marquise diamonds typically cost £246 GBP to £627 GBP, with a median price of £398 GBP. There are currently 143 diamonds matching this specification available across retailers.

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

About 47% of these diamonds are available at multiple retailers, with an average price spread of 48%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct G IF Natural Marquise

Quick answer

As of November 2026, there are 143 natural marquise diamonds with G colour and IF clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run £246 GBP to £627 GBP, with a median of £398 GBP. At least 17 retailers stock this exact specification, and 47% of the stones appear at more than one of them, with an average price spread of 48%. Half of all listings fall between £1,276 GBP and £2,158 GBP per carat. The same specification in lab grown form lists at a median of about £694 GBP per carat. Over the last 30 days the median price moved -4.9% and the number of listings moved +7.8%.

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: November 2026

Available

143

Lowest Price

£217 GBP

Highest Price

£1,268 GBP

Average Price

£417 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

47.4%

Price Spread

48.1%

30-Day Price Trend

-4.9%

30-Day Supply Change

+7.8%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$2,458/ct

10th Percentile

$1,528

Median

$2,458

90th Percentile

$4,469

Score Distribution

390 diamonds scored across 5 quality tiers

Exceptional

3 (0.8%)

Excellent

113 (29.0%)

Very Good

114 (29.2%)

Good

72 (18.5%)

Average

88 (22.6%)

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Consider Instead

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

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

Save 38%

G VVS1VVS1 inclusions are not visible without magnification

Save 29%

Lab-Grown G IFSame specifications, lab-grown origin

Save 62%

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