How much does a 1.50 to 1.99ct G IF lab grown marquise diamond cost?

As of October 2026, 1.50 to 1.99ct G IF lab grown marquise diamonds typically cost $559 USD to $3,717 USD, with a median price of $2,432 USD. There are currently 12 diamonds matching this specification available across retailers.

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

About 27% of these diamonds are available at multiple retailers, with an average price spread of 95%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct G IF Lab Grown Marquise

Quick answer

As of October 2026, there are 12 lab grown marquise diamonds with G color and IF clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $559 USD to $3,717 USD, with a median of $2,432 USD. At least 41 retailers stock this exact specification, and 27% of the stones appear at more than one of them, with an average price spread of 95%. Half of all listings fall between $520 USD and $1,513 USD per carat. The same specification in natural form lists at a median of about $12,901 USD per carat. Over the last 30 days the median price moved -12.1% and the number of listings moved +8.9%.

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 lab grown stones in the index: 485 USD per carat, -3.2% 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

$370 USD

Highest Price

$7,660 USD

Average Price

$2,237 USD

Market Intelligence

Retailers Selling

Cross Retailer %

27.4%

Price Spread

94.8%

30-Day Price Trend

-12.1%

30-Day Supply Change

+8.9%

Volatility (30d)

0.04

Price Range

Price per carat distribution across retailers

$1,048/ct

10th Percentile

$370

Median

$1,048

90th Percentile

$2,219

Score Distribution

34 diamonds scored across 4 quality tiers

Excellent

8 (23.5%)

Very Good

5 (14.7%)

Good

8 (23.5%)

Average

13 (38.2%)

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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

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G VVS1VVS1 inclusions are not visible without magnification

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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