How much does a 1.50 to 1.99ct G SI1 natural oval diamond cost?

As of October 2026, 1.50 to 1.99ct G SI1 natural oval diamonds typically cost $7,798 SGD to $19,469 SGD, with a median price of $11,945 SGD. There are currently 314 diamonds matching this specification available across retailers.

Where can I find the best price on a G SI1 oval diamond?

About 30% of these diamonds are available at multiple retailers, with an average price spread of 40%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct G SI1 Natural Oval

Quick answer

As of October 2026, there are 314 natural oval diamonds with G colour and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $7,798 SGD to $19,469 SGD, with a median of $11,945 SGD. At least 65 retailers stock this exact specification, and 30% of the stones appear at more than one of them, with an average price spread of 40%. Half of all listings fall between $6,330 SGD and $9,371 SGD per carat. The same specification in lab grown form lists at a median of about $623 SGD per carat. Over the last 30 days the median price moved -2.0% and the number of listings moved -1.2%.

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

314

Lowest Price

$3,360 SGD

Highest Price

$33,011 SGD

Average Price

$12,865 SGD