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

As of September 2026, 1.00 to 1.49ct H SI1 natural radiant diamonds typically cost $2,292 CAD to $6,443 CAD, with a median price of $3,649 CAD. There are currently 747 diamonds matching this specification available across retailers.

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

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

1.00 to 1.49ct H SI1 Natural Radiant

Quick answer

As of September 2026, there are 747 natural radiant diamonds with H color and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $2,292 CAD to $6,443 CAD, with a median of $3,649 CAD. At least 58 retailers stock this exact specification. Half of all listings fall between $2,624 CAD and $4,033 CAD per carat. The same specification in lab grown form lists at a median of about $1,886 CAD 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

747

Lowest Price

$543 CAD

Highest Price

$21,850 CAD

Average Price

$4,086 CAD

Market Intelligence

Retailers Selling

Price Spread

44.0%

Price Range

Price per carat distribution across retailers

$2,367/ct

10th Percentile

$1,631

Median

$2,367

90th Percentile

$3,794

Score Distribution

747 diamonds scored across 4 quality tiers

Excellent

73 (9.8%)

Very Good

154 (20.6%)

Good

228 (30.5%)

Average

292 (39.1%)

Find Your Diamond

Search 747 H SI1 radiant diamonds and compare prices.

Search Diamonds

Consider Instead

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

H SI2SI2 inclusions are not visible without magnification

Save 10%

Lab-Grown H SI1Same specifications, lab-grown origin

Save 44%

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