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

As of September 2026, 1.00 to 1.49ct D SI1 lab grown round diamonds typically cost $213 AUD to $1,230 AUD, with a median price of $493 AUD. There are currently 2,461 diamonds matching this specification available across retailers.

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

Compare prices across retailers on Carat Hunter to see all your options.

1.00 to 1.49ct D SI1 Lab Grown Round

Quick answer

As of September 2026, there are 2,461 lab grown round diamonds with D colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $213 AUD to $1,230 AUD, with a median of $493 AUD. At least 42 retailers stock this exact specification. Half of all listings fall between $381 AUD and $774 AUD per carat. The same specification in natural form lists at a median of about $5,801 AUD per carat.

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

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Round lab grown stones in the index: 438 USD per carat, -14.1% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

2,461

Lowest Price

$54 AUD

Highest Price

$17,577 AUD

Average Price

$722 AUD

Market Intelligence

Retailers Selling

Price Spread

72.3%

Price Range

Price per carat distribution across retailers

$390/ct

10th Percentile

$165

Median

$390

90th Percentile

$983

Score Distribution

2.5K diamonds scored across 4 quality tiers

Excellent

870 (35.4%)

Very Good

375 (15.2%)

Good

438 (17.8%)

Average

778 (31.6%)

Find Your Diamond

Search 2,461 D SI1 round diamonds and compare prices.

Search Diamonds

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