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

As of October 2026, 0.20 to 0.49ct H SI1 natural oval diamonds typically cost $388 SGD to $1,104 SGD, with a median price of $582 SGD. There are currently 602 diamonds matching this specification available across retailers.

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

About 24% of these diamonds are available at multiple retailers, with an average price spread of 41%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct H SI1 Natural Oval

Quick answer

As of October 2026, there are 602 natural oval diamonds with H colour and SI1 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run $388 SGD to $1,104 SGD, with a median of $582 SGD. At least 22 retailers stock this exact specification, and 24% of the stones appear at more than one of them, with an average price spread of 41%. Half of all listings fall between $1,352 SGD and $2,030 SGD per carat. The same specification in lab grown form lists at a median of about $775 SGD 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

602

Lowest Price

$167 SGD

Highest Price

$1,799 SGD

Average Price

$648 SGD

Market Intelligence

Retailers Selling

Cross Retailer %

24.1%

Price Spread

41.3%

30-Day Price Trend

-6.0%

30-Day Supply Change

-9.3%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,283/ct

10th Percentile

$835

Median

$1,283

90th Percentile

$1,979

Score Distribution

1.7K diamonds scored across 4 quality tiers

Excellent

115 (6.9%)

Very Good

578 (34.6%)

Good

411 (24.6%)

Average

567 (33.9%)

Find Your Diamond

Search 602 H 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.

H SI2SI2 inclusions are not visible without magnification

Save 4%

Lab-Grown H SI1Same specifications, lab-grown origin

Save 53%

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