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

As of September 2026, 1.00 to 1.49ct D SI1 natural radiant diamonds typically cost $3,809 NZD to $9,698 NZD, with a median price of $5,429 NZD. There are currently 471 diamonds matching this specification available across retailers.

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

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1.00 to 1.49ct D SI1 Natural Radiant

Quick answer

As of September 2026, there are 471 natural radiant diamonds with D colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $3,809 NZD to $9,698 NZD, with a median of $5,429 NZD. At least 58 retailers stock this exact specification. Half of all listings fall between $4,356 NZD and $6,534 NZD per carat. The same specification in lab grown form lists at a median of about $751 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. 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

471

Lowest Price

$1,804 NZD

Highest Price

$49,287 NZD

Average Price

$6,256 NZD

Market Intelligence

Retailers Selling

Price Spread

42.2%

Price Range

Price per carat distribution across retailers

$3,004/ct

10th Percentile

$2,170

Median

$3,004

90th Percentile

$4,653

Score Distribution

471 diamonds scored across 4 quality tiers

Excellent

47 (10.0%)

Very Good

95 (20.2%)

Good

161 (34.2%)

Average

168 (35.7%)

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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

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Lab-Grown D SI1Same specifications, lab-grown origin

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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