How much does a 1.50 to 1.99ct J SI2 natural oval diamond cost?

As of October 2026, 1.50 to 1.99ct J SI2 natural oval diamonds typically cost $3,675 SGD to $10,484 SGD, with a median price of $6,251 SGD. There are currently 643 diamonds matching this specification available across retailers.

Where can I find the best price on a J SI2 oval diamond?

About 36% of these diamonds are available at multiple retailers, with an average price spread of 55%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct J SI2 Natural Oval

Quick answer

As of October 2026, there are 643 natural oval diamonds with J colour and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $3,675 SGD to $10,484 SGD, with a median of $6,251 SGD. At least 54 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 55%. Half of all listings fall between $2,896 SGD and $5,003 SGD per carat. The same specification in lab grown form lists at a median of about $1,688 SGD per carat. Over the last 30 days the median price moved -2.1% and the number of listings moved +10.8%.

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. Oval natural stones in the index: 2,655 USD per carat, +10.2% 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

643

Lowest Price

$1,983 SGD

Highest Price

$20,749 SGD

Average Price

$6,739 SGD

Market Intelligence

Retailers Selling

Cross Retailer %

36.4%

Price Spread

55.2%

30-Day Price Trend

-2.1%

30-Day Supply Change

+10.8%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$2,980/ct

10th Percentile

$1,743

Median

$2,980

90th Percentile

$4,935

Score Distribution

1.9K diamonds scored across 4 quality tiers

Excellent

226 (12.0%)

Very Good

429 (22.8%)

Good

427 (22.7%)

Average

798 (42.4%)

Find Your Diamond

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Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

J I1I1 inclusions are not visible without magnification

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Lab-Grown J SI2Same specifications, lab-grown origin

Save 56%

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