How much does a 1.00 to 1.49ct G IF lab grown marquise diamond cost?

As of October 2026, 1.00 to 1.49ct G IF lab grown marquise diamonds typically cost $630 USD to $1,707 USD, with a median price of $1,281 USD. There are currently 1 diamonds matching this specification available across retailers.

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

About 30% of these diamonds are available at multiple retailers, with an average price spread of 113%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct G IF Lab Grown Marquise

Quick answer

As of October 2026, there are 1 lab grown marquise diamonds with G color and IF clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $630 USD to $1,707 USD, with a median of $1,281 USD. At least 40 retailers stock this exact specification, and 30% of the stones appear at more than one of them, with an average price spread of 113%. Half of all listings fall between $289 USD and $962 USD per carat. The same specification in natural form lists at a median of about $6,857 USD per carat. Over the last 30 days the median price moved -12.9% and the number of listings moved +38.6%.

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

1.35ct Marquise G IF, IGI, grade B, from $2,640 USD

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

$611 USD

Highest Price

$2,640 USD

Average Price

$1,234 USD

Market Intelligence

Retailers Selling

Cross Retailer %

30.1%

Price Spread

113.2%

30-Day Price Trend

-12.9%

30-Day Supply Change

+38.6%

Volatility (30d)

0.06

Price Range

Price per carat distribution across retailers

$595/ct

10th Percentile

$231

Median

$595

90th Percentile

$1,500

Score Distribution

13 diamonds scored across 2 quality tiers

Good

2 (15.4%)

Average

11 (84.6%)

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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