How much does a 1.00 to 1.49ct I SI1 natural oval diamond cost?

As of September 2026, 1.00 to 1.49ct I SI1 natural oval diamonds typically cost $2,750 NZD to $7,261 NZD, with a median price of $4,301 NZD. There are currently 2,695 diamonds matching this specification available across retailers.

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

Compare prices across retailers on Carat Hunter to see all your options.

1.00 to 1.49ct I SI1 Natural Oval

Quick answer

As of September 2026, there are 2,695 natural oval diamonds with I colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $2,750 NZD to $7,261 NZD, with a median of $4,301 NZD. At least 58 retailers stock this exact specification. Half of all listings fall between $3,641 NZD and $5,238 NZD per carat. The same specification in lab grown form lists at a median of about $1,993 NZD per carat.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Oval natural stones in the index: 2,380 USD per carat, -9.6% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

2,695

Lowest Price

$1,420 NZD

Highest Price

$16,666 NZD

Average Price

$4,712 NZD