How much does a 0.50 to 0.74ct D SI1 natural marquise diamond cost?

As of October 2026, 0.50 to 0.74ct D SI1 natural marquise diamonds typically cost $882 CAD to $2,694 CAD, with a median price of $1,353 CAD. There are currently 881 diamonds matching this specification available across retailers.

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

About 36% of these diamonds are available at multiple retailers, with an average price spread of 44%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct D SI1 Natural Marquise

Quick answer

As of October 2026, there are 881 natural marquise diamonds with D color and SI1 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $882 CAD to $2,694 CAD, with a median of $1,353 CAD. At least 62 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 44%. Half of all listings fall between $2,135 CAD and $3,267 CAD per carat. The same specification in lab grown form lists at a median of about $722 CAD per carat. Over the last 30 days the median price moved -1.5% and the number of listings moved +10.7%.

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. Marquise natural stones in the index: 2,268 USD per carat, +10.8% 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

881

Lowest Price

$499 CAD

Highest Price

$4,659 CAD

Average Price

$1,633 CAD

Market Intelligence

Retailers Selling

Cross Retailer %

35.8%

Price Spread

43.8%

30-Day Price Trend

-1.5%

30-Day Supply Change

+10.7%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,842/ct

10th Percentile

$1,308

Median

$1,842

90th Percentile

$3,089

Score Distribution

2.1K diamonds scored across 4 quality tiers

Excellent

431 (20.5%)

Very Good

627 (29.8%)

Good

498 (23.6%)

Average

551 (26.2%)

Find Your Diamond

Search 881 D SI1 marquise 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 10%

Lab-Grown D SI1Same specifications, lab-grown origin

Save 72%

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