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

As of November 2026, 1.00 to 1.49ct G SI1 lab grown marquise diamonds typically cost HK$2,775 HKD to HK$7,529 HKD, with a median price of HK$3,692 HKD. There are currently 39 diamonds matching this specification available across retailers.

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

About 21% of these diamonds are available at multiple retailers, with an average price spread of 69%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct G SI1 Lab Grown Marquise

Quick answer

As of November 2026, there are 39 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$2,775 HKD to HK$7,529 HKD, with a median of HK$3,692 HKD. At least 27 retailers stock this exact specification, and 21% of the stones appear at more than one of them, with an average price spread of 69%. Half of all listings fall between HK$2,330 HKD and HK$4,722 HKD per carat. The same specification in natural form lists at a median of about HK$36,264 HKD per carat. Over the last 30 days the median price moved -3.0% and the number of listings moved +21.4%.

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

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Marquise lab grown stones in the index: 505 USD per carat, +1.6% 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

Lowest Price

HK$934 HKD

Highest Price

HK$59,889 HKD

Average Price

HK$4,943 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

21.4%

Price Spread

69.5%

30-Day Price Trend

-3.0%

30-Day Supply Change

+21.4%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$439/ct

10th Percentile

$167

Median

$439

90th Percentile

$815

Score Distribution

74 diamonds scored across 4 quality tiers

Excellent

3 (4.1%)

Very Good

5 (6.8%)

Good

35 (47.3%)

Average

31 (41.9%)

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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