How much does a 1.00 to 1.49ct G SI1 lab grown marquise diamond cost?

As of September 2026, 1.00 to 1.49ct G SI1 lab grown marquise diamonds typically cost $502 NZD to $1,871 NZD, with a median price of $821 NZD. There are currently 77 diamonds matching this specification available across retailers.

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

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

1.00 to 1.49ct G SI1 Lab Grown Marquise

Quick answer

As of September 2026, there are 77 lab grown marquise diamonds with G colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $502 NZD to $1,871 NZD, with a median of $821 NZD. At least 22 retailers stock this exact specification. Half of all listings fall between $567 NZD and $1,178 NZD per carat. The same specification in natural form lists at a median of about $8,198 NZD per carat.

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

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Marquise lab grown stones in the index: 500 USD per carat, -14.7% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

Lowest Price

$376 NZD

Highest Price

$9,100 NZD

Average Price

$1,164 NZD

Market Intelligence

Retailers Selling

Price Spread

75.3%

Price Range

Price per carat distribution across retailers

$463/ct

10th Percentile

$283

Median

$463

90th Percentile

$1,079

Score Distribution

77 diamonds scored across 4 quality tiers

Excellent

3 (3.9%)

Very Good

8 (10.4%)

Good

34 (44.2%)

Average

32 (41.6%)

Find Your Diamond

Search 77 G SI1 marquise 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