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

As of October 2026, 0.50 to 0.74ct H SI2 lab grown oval diamonds typically cost $470 NZD to $886 NZD, with a median price of $573 NZD. There are currently 13 diamonds matching this specification available across retailers.

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

About 73% of these diamonds are available at multiple retailers, with an average price spread of 167%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct H SI2 Lab Grown Oval

Quick answer

As of October 2026, there are 13 lab grown oval diamonds with H colour and SI2 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $470 NZD to $886 NZD, with a median of $573 NZD. At least 14 retailers stock this exact specification, and 73% of the stones appear at more than one of them, with an average price spread of 167%. Half of all listings fall between $1,048 NZD and $3,211 NZD per carat. The same specification in natural form lists at a median of about $2,170 NZD per carat. Over the last 30 days the median price moved -3.3% and the number of listings moved -7.1%.

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. 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

$256 NZD

Highest Price

$3,478 NZD

Average Price

$634 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

73.3%

Price Spread

167.4%

30-Day Price Trend

-3.3%

30-Day Supply Change

-7.1%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$726/ct

10th Percentile

$538

Median

$726

90th Percentile

$2,206

Score Distribution

15 diamonds scored across 3 quality tiers

Excellent

9 (60.0%)

Very Good

3 (20.0%)

Good

3 (20.0%)

Find Your Diamond

Search 13 H SI2 oval diamonds and compare prices.

Search Diamonds

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