How much does a 1.50 to 1.99ct F SI1 natural oval diamond cost?

As of October 2026, 1.50 to 1.99ct F SI1 natural oval diamonds typically cost €5,870 EUR to €14,240 EUR, with a median price of €8,866 EUR. There are currently 308 diamonds matching this specification available across retailers.

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

About 30% of these diamonds are available at multiple retailers, with an average price spread of 40%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct F SI1 Natural Oval

Quick answer

As of October 2026, there are 308 natural oval diamonds with F colour and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run €5,870 EUR to €14,240 EUR, with a median of €8,866 EUR. At least 65 retailers stock this exact specification, and 30% of the stones appear at more than one of them, with an average price spread of 40%. Half of all listings fall between €4,432 EUR and €6,561 EUR per carat. The same specification in lab grown form lists at a median of about €436 EUR per carat. Over the last 30 days the median price moved -2.0% and the number of listings moved -1.2%.

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

308

Lowest Price

€1,983 EUR

Highest Price

€22,773 EUR

Average Price

€9,591 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

30.3%

Price Spread

40.2%

30-Day Price Trend

-2.0%

30-Day Supply Change

-1.2%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$5,917/ct

10th Percentile

$4,232

Median

$5,917

90th Percentile

$8,928

Score Distribution

978 diamonds scored across 4 quality tiers

Excellent

47 (4.8%)

Very Good

196 (20.0%)

Good

180 (18.4%)

Average

555 (56.7%)

Find Your Diamond

Search 308 F 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.

F SI2SI2 inclusions are not visible without magnification

Save 31%

Lab-Grown F SI1Same specifications, lab-grown origin

Save 92%

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