How much does a 1.00 to 1.49ct D SI1 lab grown marquise diamond cost?

As of November 2026, 1.00 to 1.49ct D SI1 lab grown marquise diamonds typically cost $255 AUD to $1,042 AUD, with a median price of $669 AUD. There are currently 32 diamonds matching this specification available across retailers.

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

About 28% of these diamonds are available at multiple retailers, with an average price spread of 72%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct D SI1 Lab Grown Marquise

Quick answer

As of November 2026, there are 32 lab grown marquise diamonds with D colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $255 AUD to $1,042 AUD, with a median of $669 AUD. At least 31 retailers stock this exact specification, and 28% of the stones appear at more than one of them, with an average price spread of 72%. Half of all listings fall between $385 AUD and $795 AUD per carat. The same specification in natural form lists at a median of about $7,670 AUD per carat. Over the last 30 days the median price moved +9.4% and the number of listings moved +20.3%.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Marquise lab grown stones in the index: 505 USD per carat, +1.6% 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: November 2026

Available

Lowest Price

$182 AUD

Highest Price

$2,605 AUD

Average Price

$696 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

28.0%

Price Spread

72.5%

30-Day Price Trend

+9.4%

30-Day Supply Change

+20.3%

Volatility (30d)

0.04

Price Range

Price per carat distribution across retailers

$397/ct

10th Percentile

$167

Median

$397

90th Percentile

$785

Score Distribution

110 diamonds scored across 4 quality tiers

Excellent

27 (24.5%)

Very Good

4 (3.6%)

Good

18 (16.4%)

Average

61 (55.5%)

Find Your Diamond

Search 32 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 21%

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