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

As of April 2026, 5.00ct+ J SI1 lab grown cushion diamonds are available from €176 EUR to €30,077 EUR, with an average price of €2,758 EUR. There are currently 514 diamonds matching this specification available across retailers.

Where can I find the best price on a J SI1 cushion diamond?

Compare prices across retailers on Carat Hunter to see all your options.

5.00ct+ J SI1 Lab Grown Cushion

As of April 2026, there are 514 lab grown cushion diamonds with J color and SI1 clarity in the 5.00ct+ range available across retailers worldwide. Prices range from €176 EUR to €30,077 EUR, with an average of €2,758 EUR.

Last updated: April 2026

Available

514

Lowest Price

€176 EUR

Highest Price

€30,077 EUR

Average Price

€2,758 EUR

Score Distribution

514 diamonds scored across 4 quality tiers

Excellent

29 (5.6%)

Very Good

94 (18.3%)

Good

273 (53.1%)

Average

118 (23.0%)

Find Your Diamond

Search 514 J SI1 cushion 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