How much does a 1.00 to 1.49ct E SI2 lab grown round diamond cost?

As of October 2026, 1.00 to 1.49ct E SI2 lab grown round diamonds typically cost $241 AUD to $2,034 AUD, with a median price of $921 AUD. There are currently 155 diamonds matching this specification available across retailers.

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

About 39% of these diamonds are available at multiple retailers, with an average price spread of 92%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct E SI2 Lab Grown Round

Quick answer

As of October 2026, there are 155 lab grown round diamonds with E colour and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $241 AUD to $2,034 AUD, with a median of $921 AUD. At least 31 retailers stock this exact specification, and 39% of the stones appear at more than one of them, with an average price spread of 92%. Half of all listings fall between $434 AUD and $1,072 AUD per carat. The same specification in natural form lists at a median of about $4,742 AUD per carat. Over the last 30 days the median price moved -1.8% and the number of listings moved +4.0%.

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. Round lab grown stones in the index: 414 USD per carat, -5.0% 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

155

Lowest Price

$192 AUD

Highest Price

$2,636 AUD

Average Price

$1,033 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

38.8%

Price Spread

92.0%

30-Day Price Trend

-1.8%

30-Day Supply Change

+4.0%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$487/ct

10th Percentile

$162

Median

$487

90th Percentile

$1,195

Score Distribution

231 diamonds scored across 4 quality tiers

Excellent

44 (19.0%)

Very Good

11 (4.8%)

Good

86 (37.2%)

Average

90 (39.0%)

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

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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