How much does a 0.20 to 0.49ct D SI1 natural cushion diamond cost?

As of October 2026, 0.20 to 0.49ct D SI1 natural cushion diamonds typically cost $350 SGD to $948 SGD, with a median price of $584 SGD. There are currently 105 diamonds matching this specification available across retailers.

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

About 36% of these diamonds are available at multiple retailers, with an average price spread of 33%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct D SI1 Natural Cushion

Quick answer

As of October 2026, there are 105 natural cushion diamonds with D colour and SI1 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run $350 SGD to $948 SGD, with a median of $584 SGD. At least 17 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 33%. Half of all listings fall between $1,709 SGD and $2,344 SGD per carat. The same specification in lab grown form lists at a median of about $847 SGD per carat. Over the last 30 days the median price moved +0.1% and the number of listings moved +4.3%.

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. Cushion natural stones in the index: 2,948 USD per carat, +1.7% 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

105

Lowest Price

$222 SGD

Highest Price

$2,089 SGD

Average Price

$626 SGD

Market Intelligence

Retailers Selling

Cross Retailer %

35.9%

Price Spread

33.1%

30-Day Price Trend

+0.1%

30-Day Supply Change

+4.3%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$1,498/ct

10th Percentile

$957

Median

$1,498

90th Percentile

$2,385

Score Distribution

265 diamonds scored across 4 quality tiers

Excellent

84 (31.7%)

Very Good

28 (10.6%)

Good

89 (33.6%)

Average

64 (24.2%)

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Consider Instead

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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