How much does a 0.50 to 0.74ct G SI2 lab grown oval diamond cost?

As of October 2026, 0.50 to 0.74ct G SI2 lab grown oval diamonds typically cost $208 NZD to $1,207 NZD, with a median price of $726 NZD. There are currently 7 diamonds matching this specification available across retailers.

Where can I find the best price on a G SI2 oval diamond?

About 48% of these diamonds are available at multiple retailers, with an average price spread of 101%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct G SI2 Lab Grown Oval

Quick answer

As of October 2026, there are 7 lab grown oval diamonds with G colour and SI2 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $208 NZD to $1,207 NZD, with a median of $726 NZD. At least 22 retailers stock this exact specification, and 48% of the stones appear at more than one of them, with an average price spread of 101%. Half of all listings fall between $955 NZD and $2,249 NZD per carat. The same specification in natural form lists at a median of about $2,433 NZD per carat. Over the last 30 days the median price moved +0.5% and the number of listings moved -15.3%.

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. Oval lab grown stones in the index: 453 USD per carat, -7.4% 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

$3,528 NZD

Average Price

$773 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

47.8%

Price Spread

100.5%

30-Day Price Trend

+0.5%

30-Day Supply Change

-15.3%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$723/ct

10th Percentile

$231

Median

$723

90th Percentile

$2,467

Score Distribution

9 diamonds scored across 4 quality tiers

Excellent

4 (44.4%)

Very Good

2 (22.2%)

Good

2 (22.2%)

Average

1 (11.1%)

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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