How much does a 0.20 to 0.49ct H SI2 natural oval diamond cost?

As of October 2026, 0.20 to 0.49ct H SI2 natural oval diamonds typically cost $280 USD to $583 USD, with a median price of $409 USD. There are currently 297 diamonds matching this specification available across retailers.

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

About 40% of these diamonds are available at multiple retailers, with an average price spread of 35%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct H SI2 Natural Oval

Quick answer

As of October 2026, there are 297 natural oval diamonds with H color and SI2 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run $280 USD to $583 USD, with a median of $409 USD. At least 13 retailers stock this exact specification, and 40% of the stones appear at more than one of them, with an average price spread of 35%. Half of all listings fall between $1,057 USD and $1,489 USD per carat. The same specification in lab grown form lists at a median of about $619 USD per carat. Over the last 30 days the median price moved -6.0% and the number of listings moved -9.3%.

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 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

297

Lowest Price

$163 USD

Highest Price

$1,260 USD

Average Price

$425 USD

Market Intelligence

Retailers Selling

Cross Retailer %

40.0%

Price Spread

35.0%

30-Day Price Trend

-6.0%

30-Day Supply Change

-9.3%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,235/ct

10th Percentile

$986

Median

$1,235

90th Percentile

$1,829

Score Distribution

945 diamonds scored across 4 quality tiers

Excellent

56 (5.9%)

Very Good

429 (45.4%)

Good

172 (18.2%)

Average

288 (30.5%)

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Lab-Grown H SI2Same specifications, lab-grown origin

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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