How much does a 0.50 to 0.74ct E SI2 natural marquise diamond cost?

As of October 2026, 0.50 to 0.74ct E SI2 natural marquise diamonds typically cost $781 AUD to $2,353 AUD, with a median price of $1,233 AUD. There are currently 363 diamonds matching this specification available across retailers.

Where can I find the best price on a E SI2 marquise diamond?

About 32% of these diamonds are available at multiple retailers, with an average price spread of 41%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct E SI2 Natural Marquise

Quick answer

As of October 2026, there are 363 natural marquise diamonds with E colour and SI2 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $781 AUD to $2,353 AUD, with a median of $1,233 AUD. At least 53 retailers stock this exact specification, and 32% of the stones appear at more than one of them, with an average price spread of 41%. Half of all listings fall between $1,959 AUD and $2,929 AUD per carat. The same specification in lab grown form lists at a median of about $555 AUD per carat. Over the last 30 days the median price moved -1.5% and the number of listings moved +9.4%.

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

363

Lowest Price

$527 AUD

Highest Price

$4,771 AUD

Average Price

$1,455 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

32.1%

Price Spread

41.0%

30-Day Price Trend

-1.5%

30-Day Supply Change

+9.4%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,664/ct

10th Percentile

$1,196

Median

$1,664

90th Percentile

$2,824

Score Distribution

870 diamonds scored across 4 quality tiers

Excellent

160 (18.4%)

Very Good

238 (27.4%)

Good

260 (29.9%)

Average

212 (24.4%)

Find Your Diamond

Search 363 E SI2 marquise diamonds and compare prices.

Search Diamonds

Consider Instead

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

F SI2F colour is visually identical to E to the naked eye

Save 11%

Lab-Grown E SI2Same specifications, lab-grown origin

Save 77%

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