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

As of October 2026, 1.00 to 1.49ct D SI1 natural round diamonds typically cost $2,728 USD to $8,091 USD, with a median price of $4,606 USD. There are currently 2,491 diamonds matching this specification available across retailers.

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

About 36% of these diamonds are available at multiple retailers, with an average price spread of 52%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct D SI1 Natural Round

Quick answer

As of October 2026, there are 2,491 natural round diamonds with D color and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $2,728 USD to $8,091 USD, with a median of $4,606 USD. At least 74 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 52%. Half of all listings fall between $3,096 USD and $5,067 USD per carat. The same specification in lab grown form lists at a median of about $380 USD per carat. Over the last 30 days the median price moved -1.4% and the number of listings moved +10.9%.

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

Caratlytics Diamond Price Index, September 2026: natural diamonds at 2,335 USD per carat and lab-grown at 443 USD per carat, a natural to lab ratio of 5.3 to 1. Round natural stones in the index: 2,248 USD per carat, +7.6% month on month. See the full index release

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

Last updated: October 2026

Available

2,491

Lowest Price

$865 USD

Highest Price

$16,586 USD

Average Price

$5,083 USD

Market Intelligence

Retailers Selling

Cross Retailer %

36.5%

Price Spread

52.3%

30-Day Price Trend

-1.4%

30-Day Supply Change

+10.9%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$3,768/ct

10th Percentile

$2,605

Median

$3,768

90th Percentile

$6,432

Score Distribution

5.3K diamonds scored across 4 quality tiers

Excellent

827 (15.5%)

Very Good

1,328 (24.8%)

Good

1,280 (23.9%)

Average

1,910 (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

Save 23%

Lab-Grown D SI1Same specifications, lab-grown origin

Save 90%

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