How much does a 3.00 to 4.99ct J SI1 lab grown princess diamond cost?

As of September 2026, 3.00 to 4.99ct J SI1 lab grown princess diamonds typically cost $7,108 SGD to $12,183 SGD, with a median price of $9,348 SGD. There are currently 70 diamonds matching this specification available across retailers.

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

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

3.00 to 4.99ct J SI1 Lab Grown Princess

Quick answer

As of September 2026, there are 70 lab grown princess diamonds with J colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $7,108 SGD to $12,183 SGD, with a median of $9,348 SGD. At least 7 retailers stock this exact specification. Half of all listings fall between $2,321 SGD and $2,728 SGD per carat. The same specification in natural form lists at a median of about $9,844 SGD per carat.

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

3.01ct Princess J SI1, GIA, score 60 of 100, from $38,658 SGD

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. Princess lab grown stones in the index: 481 USD per carat, -7.3% 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

$7,003 SGD

Highest Price

$41,476 SGD

Average Price

$11,201 SGD

Market Intelligence

Retailers Selling

Price Spread

17.5%

Price Range

Price per carat distribution across retailers

$1,835/ct

10th Percentile

$1,530

Median

$1,835

90th Percentile

$2,359

Score Distribution

70 diamonds scored across 3 quality tiers

Very Good

2 (2.9%)

Good

58 (82.9%)

Average

10 (14.3%)

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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