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

As of October 2026, 0.50 to 0.74ct J SI1 natural marquise diamonds typically cost $691 CAD to $1,741 CAD, with a median price of $1,057 CAD. There are currently 152 diamonds matching this specification available across retailers.

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

About 35% of these diamonds are available at multiple retailers, with an average price spread of 42%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct J SI1 Natural Marquise

Quick answer

As of October 2026, there are 152 natural marquise diamonds with J color and SI1 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $691 CAD to $1,741 CAD, with a median of $1,057 CAD. At least 56 retailers stock this exact specification, and 35% of the stones appear at more than one of them, with an average price spread of 42%. Half of all listings fall between $1,522 CAD and $2,297 CAD per carat. Over the last 30 days the median price moved +0.0% and the number of listings moved +9.3%.

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

152

Lowest Price

$360 CAD

Highest Price

$3,341 CAD

Average Price

$1,154 CAD

Market Intelligence

Retailers Selling

Cross Retailer %

35.5%

Price Spread

42.1%

30-Day Price Trend

+0.0%

30-Day Supply Change

+9.3%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$1,318/ct

10th Percentile

$912

Median

$1,318

90th Percentile

$2,184

Score Distribution

417 diamonds scored across 4 quality tiers

Excellent

52 (12.5%)

Very Good

85 (20.4%)

Good

94 (22.5%)

Average

186 (44.6%)

Find Your Diamond

Search 152 J 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.

J SI2SI2 inclusions are not visible without magnification

Save 8%

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