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

As of October 2026, 0.20 to 0.49ct J SI1 natural oval diamonds typically cost €237 EUR to €585 EUR, with a median price of €398 EUR. There are currently 55 diamonds matching this specification available across retailers.

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

About 25% of these diamonds are available at multiple retailers, with an average price spread of 47%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct J SI1 Natural Oval

Quick answer

As of October 2026, there are 55 natural oval diamonds with J colour and SI1 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run €237 EUR to €585 EUR, with a median of €398 EUR. At least 44 retailers stock this exact specification, and 25% of the stones appear at more than one of them, with an average price spread of 47%. Half of all listings fall between €747 EUR and €1,194 EUR per carat. Over the last 30 days the median price moved -2.5% and the number of listings moved -9.4%.

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

Lowest Price

€141 EUR

Highest Price

€1,157 EUR

Average Price

€401 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

25.0%

Price Spread

47.3%

30-Day Price Trend

-2.5%

30-Day Supply Change

-9.4%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,055/ct

10th Percentile

$698

Median

$1,055

90th Percentile

$1,708

Score Distribution

161 diamonds scored across 4 quality tiers

Excellent

17 (10.6%)

Very Good

23 (14.3%)

Good

33 (20.5%)

Average

88 (54.7%)

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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