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 €295 EUR to €860 EUR, with a median price of €463 EUR. There are currently 1,598 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 1,598 natural oval diamonds with D color and SI1 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run €295 EUR to €860 EUR, with a median of €463 EUR. 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 €1,026 EUR and €1,811 EUR per carat. The same specification in lab grown form lists at a median of about €560 EUR per carat. Over the last 30 days the median price moved +3.5% and the number of listings moved +48.4%.

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 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

1,598

Lowest Price

€125 EUR

Highest Price

€1,343 EUR

Average Price

€528 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

35.5%

Price Spread

57.5%

30-Day Price Trend

+3.5%

30-Day Supply Change

+48.4%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,525/ct

10th Percentile

$901

Median

$1,525

90th Percentile

$2,336

Score Distribution

3.6K diamonds scored across 4 quality tiers

Excellent

357 (10.0%)

Very Good

785 (21.9%)

Good

1,007 (28.1%)

Average

1,430 (40.0%)

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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