How much does a 1.00 to 1.49ct D SI1 natural oval diamond cost?

As of October 2026, 1.00 to 1.49ct D SI1 natural oval diamonds typically cost $3,130 SGD to $8,696 SGD, with a median price of $4,839 SGD. There are currently 789 diamonds matching this specification available across retailers.

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

About 35% of these diamonds are available at multiple retailers, with an average price spread of 46%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct D SI1 Natural Oval

Quick answer

As of October 2026, there are 789 natural oval diamonds with D colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $3,130 SGD to $8,696 SGD, with a median of $4,839 SGD. At least 65 retailers stock this exact specification, and 35% of the stones appear at more than one of them, with an average price spread of 46%. Half of all listings fall between $3,675 SGD and $5,695 SGD per carat. The same specification in lab grown form lists at a median of about $581 SGD per carat. Over the last 30 days the median price moved -0.1% and the number of listings moved -3.2%.

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

789

Lowest Price

$1,294 SGD

Highest Price

$17,335 SGD

Average Price

$5,530 SGD

Market Intelligence

Retailers Selling

Cross Retailer %

35.3%

Price Spread

46.3%

30-Day Price Trend

-0.1%

30-Day Supply Change

-3.2%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$3,413/ct

10th Percentile

$2,505

Median

$3,413

90th Percentile

$5,745

Score Distribution

2.1K diamonds scored across 4 quality tiers

Excellent

340 (15.9%)

Very Good

562 (26.3%)

Good

329 (15.4%)

Average

903 (42.3%)

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Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

D SI2SI2 inclusions are not visible without magnification

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Lab-Grown D SI1Same specifications, lab-grown origin

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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