How much does a 1.00 to 1.49ct E I1 natural round diamond cost?

As of September 2026, 1.00 to 1.49ct E I1 natural round diamonds typically cost $2,202 AUD to $6,204 AUD, with a median price of $3,411 AUD. There are currently 978 diamonds matching this specification available across retailers.

Where can I find the best price on a E I1 round diamond?

About 54% of these diamonds are available at multiple retailers, with an average price spread of 44%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct E I1 Natural Round

Quick answer

As of September 2026, there are 978 natural round diamonds with E colour and I1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $2,202 AUD to $6,204 AUD, with a median of $3,411 AUD. At least 26 retailers stock this exact specification, and 54% of the stones appear at more than one of them, with an average price spread of 44%. Half of all listings fall between $2,811 AUD and $4,352 AUD per carat. The same specification in lab grown form lists at a median of about $1,904 AUD per carat. Over the last 30 days the median price moved -5.3% and the number of listings moved +17.7%.

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 natural stones in the index: 2,094 USD per carat, -3.8% 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

978

Lowest Price

$1,003 AUD

Highest Price

$13,781 AUD

Average Price

$3,863 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

54.0%

Price Spread

44.1%

30-Day Price Trend

-5.3%

30-Day Supply Change

+17.7%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$2,490/ct

10th Percentile

$1,639

Median

$2,490

90th Percentile

$4,067

Score Distribution

978 diamonds scored across 4 quality tiers

Excellent

202 (20.7%)

Very Good

304 (31.1%)

Good

226 (23.1%)

Average

246 (25.2%)

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Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

F I1F 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