How much does a 1.00 to 1.49ct D SI1 natural round diamond cost?

As of September 2026, 1.00 to 1.49ct D SI1 natural round diamonds typically cost $4,323 NZD to $11,086 NZD, with a median price of $6,482 NZD. There are currently 3,835 diamonds matching this specification available across retailers.

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

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

1.00 to 1.49ct D SI1 Natural Round

Quick answer

As of September 2026, there are 3,835 natural round diamonds with D colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $4,323 NZD to $11,086 NZD, with a median of $6,482 NZD. At least 68 retailers stock this exact specification. Half of all listings fall between $5,116 NZD and $7,325 NZD per carat. The same specification in lab grown form lists at a median of about $647 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. Round natural stones in the index: 2,094 USD per carat, -3.8% 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

3,835

Lowest Price

$1,192 NZD

Highest Price

$52,523 NZD

Average Price

$7,161 NZD

Market Intelligence

Retailers Selling

Price Spread

36.5%

Price Range

Price per carat distribution across retailers

$3,636/ct

10th Percentile

$2,600

Median

$3,636

90th Percentile

$5,531

Score Distribution

3.8K diamonds scored across 4 quality tiers

Excellent

536 (14.0%)

Very Good

1,203 (31.4%)

Good

1,297 (33.8%)

Average

799 (20.8%)

Find Your Diamond

Search 3,835 D SI1 round diamonds and compare prices.

Search Diamonds

Consider Instead

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

D SI2SI2 inclusions are not visible without magnification

Save 24%

Lab-Grown D SI1Same specifications, lab-grown origin

Save 89%

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