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Cushion|Natural|IGI

1.51ct I SI2 Cushion Natural Diamond

VG • I/SI2 • IGI 729536826

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 729536826

Diamond specifications and retailer prices

From $5,679 AUD
$3,989 USD
As of November 1, 2026
Save $4,694 AUD (45%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $10,372 AUD at MOH London · As of November 1, 2026
View at MOH London

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI 729536826. Listed at 11 retailers as of November 1, 2026, with prices from $5,679 to $10,372, a $4,694 spread on the same certified stone. MOH London lists it at $10,372. 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

1.51
Carat
I
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle37.5°
Pavilion angle41.4°
OriginNatural
Grading LabIGI
CertificateIGI 729536826
Dimensions10.88 × 6.05 × 3.91 mm
L/W Ratio1.80
Girdle conditionFaceted
Culet sizePointed
Top View
10.88 mm6.05 mm1.51 ctI / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI 729536826
Side View
Table 63.0%Crown 37.5°Girdle: MED-THKPavilion 41.4°Culet: NoneDepth 64.6%

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 1
Current: $10,372 AUD|Low: $3,882 AUD|High: $12,122 AUD|Avg: $7,153 AUD|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 4$3,882 AUD
Retailer 9$5,679 AUD
Retailer 12$5,751 AUD
Retailer 11$5,804 AUD
Retailer 10$6,010 AUD
Retailer 2$6,352 AUD
Retailer 6$6,460 AUD
Retailer 7$6,513 AUD
Retailer 8$6,726 AUD
Retailer 5$7,369 AUD
MOH London$10,372 AUD
Retailer 3$12,122 AUD

13 data points across 12 retailers

11 retailers$5,679 AUD to $10,372 AUD

B+
Cheapest Retailer
-
$5,679 AUD
$3,989 USD
B+
Retailer 2
-
$5,751 AUD
$4,040 USD
View
B+
Retailer 3
-
$5,804 AUD
$4,077 USD
View
B+
Retailer 4
-
$6,010 AUD
$4,222 USD
View
Final sale: no returns
B+
Retailer 5
-
$6,352 AUD
£3,514 GBP
View
B+
Retailer 6
-
$6,460 AUD
$4,538 USD
View
B+
Retailer 7
-
$6,513 AUD
$4,575 USD
View
B+
Retailer 8
-
$6,513 AUD
$4,575 USD
View
B+
Retailer 9
-
$6,726 AUD
$4,724 USD
View
B+
Retailer 10
-
$7,369 AUD
€4,930 EUR
View
Most Expensive
B
MOH London
B4A56073B · Nov 1
$10,372 AUD
£5,737 GBP
View
10 more retailers have this diamond
Prices start from $5,679 AUDSave up to $4,694 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+
1.51ct Cushion
$5,679 AUD