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

As of September 2026, 1.00 to 1.49ct D SI1 natural cushion diamonds typically cost €1,559 EUR to €5,153 EUR, with a median price of €2,590 EUR. There are currently 774 diamonds matching this specification available across retailers.

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

Compare prices across retailers on Carat Hunter to see all your options.

1.00 to 1.49ct D SI1 Natural Cushion

Quick answer

As of September 2026, there are 774 natural cushion diamonds with D colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run €1,559 EUR to €5,153 EUR, with a median of €2,590 EUR. At least 57 retailers stock this exact specification. Half of all listings fall between €1,881 EUR and €3,314 EUR per carat. The same specification in lab grown form lists at a median of about €367 EUR per carat.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Cushion natural stones in the index: 2,792 USD per carat, +1.1% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

774

Lowest Price

€624 EUR

Highest Price

€8,908 EUR

Average Price

€2,986 EUR

Market Intelligence

Retailers Selling

Price Spread

58.6%

Price Range

Price per carat distribution across retailers

$2,667/ct

10th Percentile

$1,745

Median

$2,667

90th Percentile

$4,649

Score Distribution

773 diamonds scored across 4 quality tiers

Excellent

114 (14.7%)

Very Good

199 (25.7%)

Good

264 (34.2%)

Average

196 (25.4%)

Find Your Diamond

Search 774 D SI1 cushion diamonds and compare prices.

Search Diamonds

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

Save 9%

Lab-Grown D SI1Same specifications, lab-grown origin

Save 85%

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