How much does a 1.00 to 1.49ct D SI2 natural radiant diamond cost?

As of September 2026, 1.00 to 1.49ct D SI2 natural radiant diamonds typically cost $1,714 USD to $5,105 USD, with a median price of $2,906 USD. There are currently 450 diamonds matching this specification available across retailers.

Where can I find the best price on a D SI2 radiant diamond?

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

1.00 to 1.49ct D SI2 Natural Radiant

Quick answer

As of September 2026, there are 450 natural radiant diamonds with D color and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $1,714 USD to $5,105 USD, with a median of $2,906 USD. At least 49 retailers stock this exact specification. Half of all listings fall between $2,031 USD and $3,391 USD per carat. The same specification in lab grown form lists at a median of about $697 USD 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. Radiant natural stones in the index: 2,765 USD per carat, +6.0% 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

450

Lowest Price

$402 USD

Highest Price

$11,097 USD

Average Price

$3,282 USD

Market Intelligence

Retailers Selling

Price Spread

53.1%

Price Range

Price per carat distribution across retailers

$2,559/ct

10th Percentile

$1,701

Median

$2,559

90th Percentile

$4,243

Score Distribution

450 diamonds scored across 4 quality tiers

Excellent

70 (15.6%)

Very Good

108 (24.0%)

Good

102 (22.7%)

Average

170 (37.8%)

Find Your Diamond

Search 450 D SI2 radiant diamonds and compare prices.

Search Diamonds

Consider Instead

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

Lab-Grown D SI2Same specifications, lab-grown origin

Save 73%

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