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

As of October 2026, 3.00 to 4.99ct J SI1 lab grown asscher diamonds typically cost $6,627 NZD to $39,311 NZD, with a median price of $22,235 NZD. There are currently 2 diamonds matching this specification available across retailers.

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

About 57% of these diamonds are available at multiple retailers, with an average price spread of 25%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct J SI1 Lab Grown Asscher

Quick answer

As of October 2026, there are 2 lab grown asscher diamonds with J colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $6,627 NZD to $39,311 NZD, with a median of $22,235 NZD. At least 6 retailers stock this exact specification, and 57% of the stones appear at more than one of them, with an average price spread of 25%. Half of all listings fall between $2,722 NZD and $3,398 NZD per carat. The same specification in natural form lists at a median of about $14,010 NZD per carat.

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. Asscher lab grown stones in the index: 470 USD per carat, -4.3% 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

$5,252 NZD

Highest Price

$41,315 NZD

Average Price

$22,759 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

57.1%

Price Spread

24.5%

Price Range

Price per carat distribution across retailers

$1,547/ct

10th Percentile

$1,528

Median

$1,547

90th Percentile

$1,915

Score Distribution

4 diamonds scored across 3 quality tiers

Very Good

1 (25.0%)

Good

1 (25.0%)

Average

2 (50.0%)

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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