How much does a 1.00 to 1.49ct I I1 lab grown round diamond cost?

As of October 2026, 1.00 to 1.49ct I I1 lab grown round diamonds typically cost $502 SGD to $2,701 SGD, with a median price of $640 SGD. There are currently 10 diamonds matching this specification available across retailers.

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

About 19% of these diamonds are available at multiple retailers, with an average price spread of 109%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct I I1 Lab Grown Round

Quick answer

As of October 2026, there are 10 lab grown round diamonds with I colour and I1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $502 SGD to $2,701 SGD, with a median of $640 SGD. At least 16 retailers stock this exact specification, and 19% of the stones appear at more than one of them, with an average price spread of 109%. Half of all listings fall between $614 SGD and $2,322 SGD per carat. The same specification in natural form lists at a median of about $2,743 SGD per carat. Over the last 30 days the median price moved -30.9% and the number of listings moved -64.9%.

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

$409 SGD

Highest Price

$3,329 SGD

Average Price

$1,130 SGD

Market Intelligence

Retailers Selling

Cross Retailer %

18.5%

Price Spread

108.7%

30-Day Price Trend

-30.9%

30-Day Supply Change

-64.9%

Volatility (30d)

0.12

Price Range

Price per carat distribution across retailers

$1,225/ct

10th Percentile

$403

Median

$1,225

90th Percentile

$2,058

Score Distribution

15 diamonds scored across 4 quality tiers

Excellent

1 (6.7%)

Very Good

8 (53.3%)

Good

4 (26.7%)

Average

2 (13.3%)

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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