How much does a 0.50 to 0.74ct E SI1 lab grown princess diamond cost?

As of October 2026, 0.50 to 0.74ct E SI1 lab grown princess diamonds typically cost $303 NZD to $1,191 NZD, with a median price of $951 NZD. There are currently 10 diamonds matching this specification available across retailers.

Where can I find the best price on a E SI1 princess diamond?

About 36% of these diamonds are available at multiple retailers, with an average price spread of 107%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct E SI1 Lab Grown Princess

Quick answer

As of October 2026, there are 10 lab grown princess diamonds with E colour and SI1 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $303 NZD to $1,191 NZD, with a median of $951 NZD. At least 25 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 107%. Half of all listings fall between $502 NZD and $1,513 NZD per carat. The same specification in natural form lists at a median of about $2,317 NZD per carat. Over the last 30 days the median price moved -12.7% and the number of listings moved +11.1%.

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. Princess lab grown stones in the index: 461 USD per carat, -4.8% 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

$162 NZD

Highest Price

$2,714 NZD

Average Price

$897 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

35.7%

Price Spread

106.5%

30-Day Price Trend

-12.7%

30-Day Supply Change

+11.1%

Volatility (30d)

0.05

Price Range

Price per carat distribution across retailers

$533/ct

10th Percentile

$215

Median

$533

90th Percentile

$1,157

Score Distribution

22 diamonds scored across 4 quality tiers

Excellent

3 (13.6%)

Very Good

2 (9.1%)

Good

5 (22.7%)

Average

12 (54.5%)

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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