How much does a 1.00 to 1.49ct H SI2 lab grown cushion diamond cost?

As of September 2026, 1.00 to 1.49ct H SI2 lab grown cushion diamonds typically cost $664 USD to $5,516 USD, with a median price of $3,841 USD. There are currently 18 diamonds matching this specification available across retailers.

Where can I find the best price on a H SI2 cushion diamond?

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

1.00 to 1.49ct H SI2 Lab Grown Cushion

Quick answer

As of September 2026, there are 18 lab grown cushion diamonds with H color and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $664 USD to $5,516 USD, with a median of $3,841 USD. At least 4 retailers stock this exact specification. Half of all listings fall between $1,711 USD and $3,478 USD per carat. The same specification in natural form lists at a median of about $2,347 USD per carat.

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Cushion lab grown stones in the index: 466 USD per carat, -14.7% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

Lowest Price

$614 USD

Highest Price

$5,701 USD

Average Price

$3,427 USD

Market Intelligence

Retailers Selling

Price Spread

91.8%

Price Range

Price per carat distribution across retailers

$1,925/ct

10th Percentile

$1,644

Median

$1,925

90th Percentile

$4,360

Score Distribution

18 diamonds scored across 2 quality tiers

Good

1 (5.6%)

Average

17 (94.4%)

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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