How much does a 3.00 to 4.99ct D IF lab grown marquise diamond cost?

As of October 2026, 3.00 to 4.99ct D IF lab grown marquise diamonds typically cost $4,636 AUD to $20,162 AUD, with a median price of $8,307 AUD. There are currently 174 diamonds matching this specification available across retailers.

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

About 40% of these diamonds are available at multiple retailers, with an average price spread of 83%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct D IF Lab Grown Marquise

Quick answer

As of October 2026, there are 174 lab grown marquise diamonds with D colour and IF clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $4,636 AUD to $20,162 AUD, with a median of $8,307 AUD. At least 49 retailers stock this exact specification, and 40% of the stones appear at more than one of them, with an average price spread of 83%. Half of all listings fall between $1,807 AUD and $3,996 AUD per carat. The same specification in natural form lists at a median of about $39,791 AUD per carat. Over the last 30 days the median price moved -14.2% and the number of listings moved +14.9%.

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. Marquise lab grown stones in the index: 485 USD per carat, -3.2% 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

174

Lowest Price

$3,263 AUD

Highest Price

$63,774 AUD

Average Price

$11,561 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

39.9%

Price Spread

82.9%

30-Day Price Trend

-14.2%

30-Day Supply Change

+14.9%

Volatility (30d)

0.05

Price Range

Price per carat distribution across retailers

$1,854/ct

10th Percentile

$961

Median

$1,854

90th Percentile

$4,043

Score Distribution

523 diamonds scored across 4 quality tiers

Excellent

184 (35.2%)

Very Good

140 (26.8%)

Good

143 (27.3%)

Average

56 (10.7%)

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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