How much does a 0.50 to 0.74ct K SI1 natural oval diamond cost?

As of November 6, 2026, 0.50 to 0.74ct K SI1 natural oval diamonds typically cost €384 EUR to €1,167 EUR, with a median price of €674 EUR. There are currently 244 diamonds matching this specification available across retailers.

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

About 40% of these diamonds are available at multiple retailers, with an average price spread of 65%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct K SI1 Natural Oval

Quick answer

As of November 6, 2026, there are 244 natural oval diamonds with K colour and SI1 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run €384 EUR to €1,167 EUR, with a median of €674 EUR. Half of all listings fall between €747 EUR and €1,416 EUR per carat. The same specification in lab grown form lists at a median of about €463 EUR per carat. Over the last 30 days the median price moved -1.3% and the number of listings moved +4.0%.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Oval natural stones in the index: 2,512 USD per carat, -7.2% month on month. See the full index release

Figures come from current listings across more than 125 retailers. The index is a monthly release.

Last updated: November 6, 2026

Available

244

Lowest Price

€266 EUR

Highest Price

€2,072 EUR

Average Price

€709 EUR

Market Intelligence

Cross Retailer %

40.2%

Price Spread

65.4%

30-Day Price Trend

-1.3%

30-Day Supply Change

+4.0%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$1,142/ct

10th Percentile

$687

Median

$1,142

90th Percentile

$1,908

Score Distribution

244 diamonds scored across 4 quality tiers

Excellent

44 (18.0%)

Very Good

57 (23.4%)

Good

42 (17.2%)

Average

101 (41.4%)

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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