How much does a 0.20 to 0.49ct D SI1 natural oval diamond cost?

As of October 2026, 0.20 to 0.49ct D SI1 natural oval diamonds typically cost $588 NZD to $1,723 NZD, with a median price of $923 NZD. There are currently 1,588 diamonds matching this specification available across retailers.

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

About 36% of these diamonds are available at multiple retailers, with an average price spread of 58%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct D SI1 Natural Oval

Quick answer

As of October 2026, there are 1,588 natural oval diamonds with D colour and SI1 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run $588 NZD to $1,723 NZD, with a median of $923 NZD. At least 28 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 58%. Half of all listings fall between $2,040 NZD and $3,612 NZD per carat. The same specification in lab grown form lists at a median of about $1,114 NZD per carat. Over the last 30 days the median price moved +3.9% and the number of listings moved +48.2%.

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 natural stones in the index: 2,655 USD per carat, +10.2% 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

1,588

Lowest Price

$248 NZD

Highest Price

$2,671 NZD

Average Price

$1,054 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

35.9%

Price Spread

57.7%

30-Day Price Trend

+3.9%

30-Day Supply Change

+48.2%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,530/ct

10th Percentile

$901

Median

$1,530

90th Percentile

$2,336

Score Distribution

3.6K diamonds scored across 4 quality tiers

Excellent

354 (9.9%)

Very Good

780 (21.8%)

Good

1,007 (28.1%)

Average

1,438 (40.2%)

Find Your Diamond

Search 1,588 D SI1 oval diamonds and compare prices.

Search Diamonds

Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

Lab-Grown D SI1Same specifications, lab-grown origin

Save 63%

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