How much does a 3.00 to 4.99ct D SI2 natural cushion diamond cost?

As of October 2026, 3.00 to 4.99ct D SI2 natural cushion diamonds typically cost $24,977 USD to $59,869 USD, with a median price of $39,108 USD. There are currently 62 diamonds matching this specification available across retailers.

Where can I find the best price on a D SI2 cushion diamond?

About 44% of these diamonds are available at multiple retailers, with an average price spread of 35%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct D SI2 Natural Cushion

Quick answer

As of October 2026, there are 62 natural cushion diamonds with D color and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $24,977 USD to $59,869 USD, with a median of $39,108 USD. At least 47 retailers stock this exact specification, and 44% of the stones appear at more than one of them, with an average price spread of 35%. Half of all listings fall between $10,450 USD and $14,975 USD per carat. The same specification in lab grown form lists at a median of about $402 USD per carat. Over the last 30 days the median price moved -1.3% and the number of listings moved +10.2%.

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. 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

Lowest Price

$12,879 USD

Highest Price

$121,953 USD

Average Price

$42,815 USD

Market Intelligence

Retailers Selling

Cross Retailer %

44.2%

Price Spread

35.5%

30-Day Price Trend

-1.3%

30-Day Supply Change

+10.2%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$12,751/ct

10th Percentile

$8,181

Median

$12,751

90th Percentile

$17,088

Score Distribution

117 diamonds scored across 4 quality tiers

Excellent

30 (25.6%)

Very Good

37 (31.6%)

Good

25 (21.4%)

Average

25 (21.4%)

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Consider Instead

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

D I1I1 inclusions are not visible without magnification

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Lab-Grown D SI2Same 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