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 HK$2,198 HKD to HK$8,511 HKD, with a median price of HK$3,686 HKD. There are currently 76 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 76 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 HK$2,198 HKD to HK$8,511 HKD, with a median of HK$3,686 HKD. At least 21 retailers stock this exact specification. Half of all listings fall between HK$2,502 HKD and HK$5,075 HKD per carat. The same specification in natural form lists at a median of about HK$36,917 HKD 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

HK$1,412 HKD

Highest Price

HK$40,772 HKD

Average Price

HK$5,220 HKD

Market Intelligence

Retailers Selling

Price Spread

70.9%

Price Range

Price per carat distribution across retailers

$462/ct

10th Percentile

$281

Median

$462

90th Percentile

$1,119

Score Distribution

76 diamonds scored across 4 quality tiers

Excellent

2 (2.6%)

Very Good

8 (10.5%)

Good

34 (44.7%)

Average

32 (42.1%)

Find Your Diamond

Search 76 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