How much does a 1.50 to 1.99ct E SI2 natural round diamond cost?

As of October 2026, 1.50 to 1.99ct E SI2 natural round diamonds typically cost $5,229 SGD to $17,457 SGD, with a median price of $9,186 SGD. There are currently 996 diamonds matching this specification available across retailers.

Where can I find the best price on a E SI2 round diamond?

About 38% of these diamonds are available at multiple retailers, with an average price spread of 51%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct E SI2 Natural Round

Quick answer

As of October 2026, there are 996 natural round diamonds with E colour and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $5,229 SGD to $17,457 SGD, with a median of $9,186 SGD. At least 58 retailers stock this exact specification, and 38% of the stones appear at more than one of them, with an average price spread of 51%. Half of all listings fall between $4,983 SGD and $8,257 SGD per carat. The same specification in lab grown form lists at a median of about $542 SGD per carat. Over the last 30 days the median price moved -1.2% and the number of listings moved +9.5%.

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 natural stones in the index: 2,248 USD per carat, +7.6% 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

996

Lowest Price

$2,582 SGD

Highest Price

$35,486 SGD

Average Price

$10,394 SGD