How much does a 1.50 to 1.99ct J I1 lab grown round diamond cost?

As of October 2026, 1.50 to 1.99ct J I1 lab grown round diamonds typically cost $408 SGD to $6,174 SGD, with a median price of $1,275 SGD. There are currently 6 diamonds matching this specification available across retailers.

Where can I find the best price on a J I1 round diamond?

About 56% of these diamonds are available at multiple retailers, with an average price spread of 157%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct J I1 Lab Grown Round

Quick answer

As of October 2026, there are 6 lab grown round diamonds with J colour and I1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $408 SGD to $6,174 SGD, with a median of $1,275 SGD. At least 19 retailers stock this exact specification, and 56% of the stones appear at more than one of them, with an average price spread of 157%. Half of all listings fall between $465 SGD and $1,653 SGD per carat. The same specification in natural form lists at a median of about $3,267 SGD per carat. Over the last 30 days the median price moved -46.7% and the number of listings moved -21.5%.

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. Round lab grown stones in the index: 414 USD per carat, -5.0% 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

$192 SGD

Highest Price

$7,210 SGD

Average Price

$2,772 SGD

Market Intelligence

Retailers Selling

Cross Retailer %

55.6%

Price Spread

156.6%

30-Day Price Trend

-46.7%

30-Day Supply Change

-21.5%

Volatility (30d)

0.24

Price Range

Price per carat distribution across retailers

$592/ct

10th Percentile

$141

Median

$592

90th Percentile

$2,112

Score Distribution

9 diamonds scored across 4 quality tiers

Excellent

1 (11.1%)

Very Good

3 (33.3%)

Good

2 (22.2%)

Average

3 (33.3%)

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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