How much does a 3.00 to 4.99ct E SI2 natural radiant diamond cost?

As of October 2026, 3.00 to 4.99ct E SI2 natural radiant diamonds typically cost $37,330 AUD to $102,341 AUD, with a median price of $67,705 AUD. There are currently 37 diamonds matching this specification available across retailers.

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

About 34% of these diamonds are available at multiple retailers, with an average price spread of 39%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct E SI2 Natural Radiant

Quick answer

As of October 2026, there are 37 natural radiant diamonds with E colour and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $37,330 AUD to $102,341 AUD, with a median of $67,705 AUD. At least 39 retailers stock this exact specification, and 34% of the stones appear at more than one of them, with an average price spread of 39%. Half of all listings fall between $13,703 AUD and $20,322 AUD per carat. The same specification in lab grown form lists at a median of about $407 AUD per carat. Over the last 30 days the median price moved -1.3% and the number of listings moved +22.5%.

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. Radiant natural stones in the index: 3,091 USD per carat, +13.2% 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

$23,975 AUD

Highest Price

$123,088 AUD

Average Price

$67,459 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

33.9%

Price Spread

38.9%

30-Day Price Trend

-1.3%

30-Day Supply Change

+22.5%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$11,953/ct

10th Percentile

$7,254

Median

$11,953

90th Percentile

$16,224

Score Distribution

103 diamonds scored across 5 quality tiers

Exceptional

1 (1.0%)

Excellent

31 (30.1%)

Very Good

11 (10.7%)

Good

11 (10.7%)

Average

49 (47.6%)

Find Your Diamond

Search 37 E SI2 radiant diamonds and compare prices.

Search Diamonds

Consider Instead

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

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

Save 9%

Lab-Grown E SI2Same specifications, lab-grown origin

Save 98%

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