How much does a 1.00 to 1.49ct E SI2 natural radiant diamond cost?

As of October 2026, 1.00 to 1.49ct E SI2 natural radiant diamonds typically cost $2,950 NZD to $11,596 NZD, with a median price of $5,706 NZD. There are currently 189 diamonds matching this specification available across retailers.

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

About 37% of these diamonds are available at multiple retailers, with an average price spread of 62%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct E SI2 Natural Radiant

Quick answer

As of October 2026, there are 189 natural radiant diamonds with E colour and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $2,950 NZD to $11,596 NZD, with a median of $5,706 NZD. At least 55 retailers stock this exact specification, and 37% of the stones appear at more than one of them, with an average price spread of 62%. Half of all listings fall between $3,576 NZD and $6,465 NZD per carat. The same specification in lab grown form lists at a median of about $1,096 NZD per carat. Over the last 30 days the median price moved +0.6% and the number of listings moved +11.4%.

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

189

Lowest Price

$1,379 NZD

Highest Price

$16,513 NZD

Average Price

$6,377 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

36.7%

Price Spread

61.6%

30-Day Price Trend

+0.6%

30-Day Supply Change

+11.4%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$2,635/ct

10th Percentile

$1,647

Median

$2,635

90th Percentile

$4,611

Score Distribution

564 diamonds scored across 4 quality tiers

Excellent

118 (20.9%)

Very Good

87 (15.4%)

Good

112 (19.9%)

Average

247 (43.8%)

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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 11%

Lab-Grown E SI2Same specifications, lab-grown origin

Save 77%

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