How much does a 3.00 to 4.99ct G SI1 lab grown oval diamond cost?

As of October 2026, 3.00 to 4.99ct G SI1 lab grown oval diamonds typically cost $975 NZD to $5,888 NZD, with a median price of $2,778 NZD. There are currently 112 diamonds matching this specification available across retailers.

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

About 26% of these diamonds are available at multiple retailers, with an average price spread of 98%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct G SI1 Lab Grown Oval

Quick answer

As of October 2026, there are 112 lab grown oval diamonds with G colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $975 NZD to $5,888 NZD, with a median of $2,778 NZD. At least 37 retailers stock this exact specification, and 26% of the stones appear at more than one of them, with an average price spread of 98%. Half of all listings fall between $463 NZD and $1,239 NZD per carat. The same specification in natural form lists at a median of about $31,450 NZD per carat. Over the last 30 days the median price moved +16.6% and the number of listings moved +10.4%.

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. 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

112

Lowest Price

$614 NZD

Highest Price

$11,356 NZD

Average Price

$3,251 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

25.6%

Price Spread

97.7%

30-Day Price Trend

+16.6%

30-Day Supply Change

+10.4%

Volatility (30d)

0.06

Price Range

Price per carat distribution across retailers

$446/ct

10th Percentile

$159

Median

$446

90th Percentile

$1,064

Score Distribution

423 diamonds scored across 4 quality tiers

Excellent

58 (13.7%)

Very Good

30 (7.1%)

Good

53 (12.5%)

Average

282 (66.7%)

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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