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

As of October 2026, 1.50 to 1.99ct G SI2 natural oval diamonds typically cost $2,597 USD to $11,256 USD, with a median price of $5,955 USD. There are currently 964 diamonds matching this specification available across retailers.

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

About 36% of these diamonds are available at multiple retailers, with an average price spread of 58%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct G SI2 Natural Oval

Quick answer

As of October 2026, there are 964 natural oval diamonds with G color and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $2,597 USD to $11,256 USD, with a median of $5,955 USD. At least 55 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 58%. Half of all listings fall between $3,024 USD and $5,405 USD per carat. The same specification in lab grown form lists at a median of about $516 USD per carat. Over the last 30 days the median price moved -2.3% and the number of listings moved +2.6%.

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

964

Lowest Price

$1,379 USD

Highest Price

$22,042 USD

Average Price

$6,522 USD