How much does a 5.00ct+ J SI1 lab grown marquise diamond cost?

As of April 2026, 5.00ct+ J SI1 lab grown marquise diamonds are available from £109 GBP to £32,560 GBP, with an average price of £2,246 GBP. There are currently 103 diamonds matching this specification available across retailers.

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5.00ct+ J SI1 Lab Grown Marquise

As of April 2026, there are 103 lab grown marquise diamonds with J color and SI1 clarity in the 5.00ct+ range available across retailers worldwide. Prices range from £109 GBP to £32,560 GBP, with an average of £2,246 GBP.

Last updated: April 2026

Available

103

Lowest Price

£109 GBP

Highest Price

£32,560 GBP

Average Price

£2,246 GBP

Score Distribution

103 diamonds scored across 4 quality tiers

Excellent

8 (7.8%)

Very Good

40 (38.8%)

Good

37 (35.9%)

Average

18 (17.5%)

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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