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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 $3,672 AUD
As of November 4, 2026
Save $1,102 AUD (23%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $4,774 AUD 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 $3,672 to $4,774, a $1,102 spread on the same certified stone. Yorxs lists it at $4,774. 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: $4,100 AUD|Low: $3,672 AUD|High: $4,879 AUD|Avg: $4,262 AUD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Yorxs
November 6, 2026
Retailer 5$3,672 AUD
Retailer 2$3,828 AUD
Retailer 1$4,100 AUD
Retailer 4$4,307 AUD
Yorxs$4,774 AUD
Retailer 3$4,879 AUD

20 data points across 6 retailers

5 retailers$3,672 AUD to $4,774 AUD

B+
Cheapest Retailer
-
$3,672 AUD
B+
Retailer 2
-
$3,828 AUD
View
Retailer 3
-
$4,100 AUD
View
Price last confirmed 9 days ago
B+
Retailer 4
-
$4,307 AUD
View
Most Expensive
B
Yorxs
B7438EC5D · Nov 6
$4,774 AUD
€3,124 EUR
View
4 more retailers have this diamond
Prices start from $3,672 AUDSave up to $1,102 AUD

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
$3,672 AUD