How much does a 1.00 to 1.49ct J VS1 lab grown marquise diamond cost?

As of October 2026, 1.00 to 1.49ct J VS1 lab grown marquise diamonds typically cost £288 GBP to £796 GBP, with a median price of £694 GBP. There are currently 1 diamonds matching this specification available across retailers.

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

About 63% of these diamonds are available at multiple retailers, with an average price spread of 94%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct J VS1 Lab Grown Marquise

Quick answer

As of October 2026, there are 1 lab grown marquise diamonds with J colour and VS1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £288 GBP to £796 GBP, with a median of £694 GBP. At least 19 retailers stock this exact specification, and 63% of the stones appear at more than one of them, with an average price spread of 94%. Half of all listings fall between £248 GBP and £635 GBP per carat. The same specification in natural form lists at a median of about £2,594 GBP per carat.

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

1.40ct Marquise J VS1, IGI, grade B, from £821 GBP

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

£187 GBP

Highest Price

£821 GBP

Average Price

£567 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

62.5%

Price Spread

94.5%

Price Range

Price per carat distribution across retailers

$549/ct

10th Percentile

$159

Median

$549

90th Percentile

$1,296

Score Distribution

3 diamonds scored across 2 quality tiers

Good

2 (66.7%)

Average

1 (33.3%)

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Search 1 J VS1 marquise diamonds and compare prices.

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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