How much does a 2.00 to 2.99ct D SI1 lab grown marquise diamond cost?

As of October 2026, 2.00 to 2.99ct D SI1 lab grown marquise diamonds typically cost $421 AUD to $3,657 AUD, with a median price of $1,210 AUD. There are currently 31 diamonds matching this specification available across retailers.

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

About 38% of these diamonds are available at multiple retailers, with an average price spread of 133%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct D SI1 Lab Grown Marquise

Quick answer

As of October 2026, there are 31 lab grown marquise diamonds with D colour and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run $421 AUD to $3,657 AUD, with a median of $1,210 AUD. At least 28 retailers stock this exact specification, and 38% of the stones appear at more than one of them, with an average price spread of 133%. Half of all listings fall between $411 AUD and $1,199 AUD per carat. The same specification in natural form lists at a median of about $19,433 AUD per carat. Over the last 30 days the median price moved +28.6% and the number of listings moved +86.9%.

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

Lowest Price

$407 AUD

Highest Price

$5,596 AUD

Average Price

$1,401 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

38.1%

Price Spread

133.3%

30-Day Price Trend

+28.6%

30-Day Supply Change

+86.9%

Volatility (30d)

0.22

Price Range

Price per carat distribution across retailers

$415/ct

10th Percentile

$161

Median

$415

90th Percentile

$1,312

Score Distribution

71 diamonds scored across 4 quality tiers

Excellent

26 (36.6%)

Very Good

7 (9.9%)

Good

6 (8.5%)

Average

32 (45.1%)

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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