How much does a 1.50 to 1.99ct I VS1 lab grown radiant diamond cost?

As of October 2026, 1.50 to 1.99ct I VS1 lab grown radiant diamonds typically cost $398 SGD to $2,465 SGD, with a median price of $802 SGD. There are currently 41 diamonds matching this specification available across retailers.

Where can I find the best price on a I VS1 radiant diamond?

About 25% of these diamonds are available at multiple retailers, with an average price spread of 92%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct I VS1 Lab Grown Radiant

Quick answer

As of October 2026, there are 41 lab grown radiant diamonds with I colour and VS1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $398 SGD to $2,465 SGD, with a median of $802 SGD. At least 45 retailers stock this exact specification, and 25% of the stones appear at more than one of them, with an average price spread of 92%. Half of all listings fall between $370 SGD and $926 SGD per carat. The same specification in natural form lists at a median of about $7,634 SGD per carat. Over the last 30 days the median price moved +6.7% and the number of listings moved +14.9%.

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. Radiant lab grown stones in the index: 474 USD per carat, -2.1% 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

$240 SGD

Highest Price

$5,139 SGD

Average Price

$1,176 SGD

Market Intelligence

Retailers Selling

Cross Retailer %

24.7%

Price Spread

92.2%

30-Day Price Trend

+6.7%

30-Day Supply Change

+14.9%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$470/ct

10th Percentile

$175

Median

$470

90th Percentile

$1,316

Score Distribution

96 diamonds scored across 4 quality tiers

Excellent

19 (19.8%)

Very Good

17 (17.7%)

Good

25 (26.0%)

Average

35 (36.5%)

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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