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Cushion|Natural|IGI

1.80ct M SI2 Cushion Natural Diamond

VG • M/SI2 • IGI 729536751

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI 729536751

Diamond specifications and retailer prices

From $4,551 NZD
As of November 4, 2026
Save $1,366 NZD (23%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $5,917 NZD at Yorxs · As of November 6, 2026
View at Yorxs

About this 1.8ct natural cushion diamond

This 1.8ct natural cushion sits in the one-and-a-half to two carat band, graded M colour (faint-tinted) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI 729536751. Listed at 5 retailers as of November 4, 2026, with prices from $4,551 to $5,917, a $1,366 spread on the same certified stone. Yorxs lists it at $5,917. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.80
Carat
M
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle29.2°
OriginNatural
Grading LabIGI
CertificateIGI 729536751
Dimensions6.64 × 6.36 × 4.49 mm
L/W Ratio1.04
Girdle conditionFaceted
Culet sizePointed
Top View
6.64 mm6.36 mm1.80 ctM / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 729536751
Side View
Table 60.0%Crown 36.4°Girdle: STK-VTKPavilion 29.2°Culet: NoneDepth 70.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $5,082 NZD|Low: $4,551 NZD|High: $6,047 NZD|Avg: $5,282 NZD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Yorxs
November 6, 2026
Retailer 5$4,551 NZD
Retailer 2$4,744 NZD
Retailer 1$5,082 NZD
Retailer 4$5,338 NZD
Yorxs$5,917 NZD
Retailer 3$6,047 NZD

20 data points across 6 retailers

5 retailers$4,551 NZD to $5,917 NZD

B+
Cheapest Retailer
-
$4,551 NZD
B+
Retailer 2
-
$4,744 NZD
View
Retailer 3
-
$5,082 NZD
View
Price last confirmed 9 days ago
B+
Retailer 4
-
$5,338 NZD
View
Most Expensive
B
Yorxs
B7438EC5D · Nov 6
$5,917 NZD
€3,124 EUR
View
4 more retailers have this diamond
Prices start from $4,551 NZDSave up to $1,366 NZD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B+
1.80ct Cushion
$4,551 NZD