How much does a 0.50 to 0.74ct J VS1 lab grown marquise diamond cost?

As of October 2026, 0.50 to 0.74ct J VS1 lab grown marquise diamonds typically cost $297 AUD to $716 AUD, with a median price of $507 AUD. There are currently 2 diamonds matching this specification available across retailers.

Where can I find the best price on a J VS1 marquise diamond?

About 57% of these diamonds are available at multiple retailers, with an average price spread of 91%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct J VS1 Lab Grown Marquise

Quick answer

As of October 2026, there are 2 lab grown marquise diamonds with J colour and VS1 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $297 AUD to $716 AUD, with a median of $507 AUD. At least 17 retailers stock this exact specification, and 57% of the stones appear at more than one of them, with an average price spread of 91%. Half of all listings fall between $462 AUD and $1,159 AUD per carat. The same specification in natural form lists at a median of about $1,992 AUD per carat.

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

$245 AUD

Highest Price

$1,054 AUD

Average Price

$507 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

57.1%

Price Spread

91.0%

Price Range

Price per carat distribution across retailers

$538/ct

10th Percentile

$218

Median

$538

90th Percentile

$1,286

Score Distribution

2 diamonds scored across 2 quality tiers

Excellent

1 (50.0%)

Good

1 (50.0%)

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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