How much does a 3.00 to 4.99ct F SI1 lab grown cushion diamond cost?

As of October 2026, 3.00 to 4.99ct F SI1 lab grown cushion diamonds typically cost $722 SGD to $4,798 SGD, with a median price of $1,834 SGD. There are currently 96 diamonds matching this specification available across retailers.

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

About 25% of these diamonds are available at multiple retailers, with an average price spread of 95%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct F SI1 Lab Grown Cushion

Quick answer

As of October 2026, there are 96 lab grown cushion diamonds with F colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $722 SGD to $4,798 SGD, with a median of $1,834 SGD. At least 36 retailers stock this exact specification, and 25% of the stones appear at more than one of them, with an average price spread of 95%. Half of all listings fall between $359 SGD and $921 SGD per carat. The same specification in natural form lists at a median of about $19,371 SGD per carat. Over the last 30 days the median price moved +11.6% and the number of listings moved +2.1%.

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. Cushion lab grown stones in the index: 516 USD per carat, +6.9% 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

$421 SGD

Highest Price

$9,035 SGD

Average Price

$2,345 SGD

Market Intelligence

Retailers Selling

Cross Retailer %

25.2%

Price Spread

95.0%

30-Day Price Trend

+11.6%

30-Day Supply Change

+2.1%

Volatility (30d)

0.03

Price Range

Price per carat distribution across retailers

$463/ct

10th Percentile

$215

Median

$463

90th Percentile

$1,094

Score Distribution

290 diamonds scored across 4 quality tiers

Excellent

63 (21.7%)

Very Good

41 (14.1%)

Good

39 (13.4%)

Average

147 (50.7%)

Find Your Diamond

Search 96 F SI1 cushion diamonds and compare prices.

Search Diamonds

Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

F SI2SI2 inclusions are not visible without magnification

Save 24%

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