How much does a 0.75 to 0.99ct D SI1 lab grown oval diamond cost?

As of October 2026, 0.75 to 0.99ct D SI1 lab grown oval diamonds typically cost $272 NZD to $1,354 NZD, with a median price of $828 NZD. There are currently 71 diamonds matching this specification available across retailers.

Where can I find the best price on a D SI1 oval diamond?

About 29% of these diamonds are available at multiple retailers, with an average price spread of 102%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct D SI1 Lab Grown Oval

Quick answer

As of October 2026, there are 71 lab grown oval diamonds with D colour and SI1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run $272 NZD to $1,354 NZD, with a median of $828 NZD. At least 35 retailers stock this exact specification, and 29% of the stones appear at more than one of them, with an average price spread of 102%. Half of all listings fall between $519 NZD and $1,385 NZD per carat. The same specification in natural form lists at a median of about $4,220 NZD per carat. Over the last 30 days the median price moved -7.2% and the number of listings moved +12.3%.

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

$203 NZD

Highest Price

$2,760 NZD

Average Price

$847 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

28.7%

Price Spread

101.7%

30-Day Price Trend

-7.2%

30-Day Supply Change

+12.3%

Volatility (30d)

0.03

Price Range

Price per carat distribution across retailers

$479/ct

10th Percentile

$183

Median

$479

90th Percentile

$1,208

Score Distribution

152 diamonds scored across 4 quality tiers

Excellent

36 (23.7%)

Very Good

40 (26.3%)

Good

16 (10.5%)

Average

60 (39.5%)

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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