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Cushion|Natural|IGI

0.51ct I SI1 Cushion Natural Diamond

VG • I/SI1 • IGI 815673863

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

Certificate IGI 815673863

Diamond specifications and retailer prices

From $531 AUD
₹35,410 INR
As of November 2, 2026
Save $1,095 AUD (67%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $1,626 AUD at MOH London · As of November 2, 2026
View at MOH London

About this 0.51ct natural cushion diamond

This 0.51ct natural cushion sits in the half to three-quarter carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 815673863. Listed at 10 retailers as of November 2, 2026, with prices from $531 to $1,626, a $1,095 spread on the same certified stone. MOH London lists it at $1,626. 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

0.51
Carat
I
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.2°
Pavilion angle36.6°
OriginNatural
Grading LabIGI
CertificateIGI 815673863
Dimensions4.67 × 4.62 × 2.91 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Top View
4.67 mm4.62 mm0.51 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 815673863
Side View
Table 60.0%Crown 32.2°Girdle: STK-VTKPavilion 36.6°Culet: NoneDepth 63.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $1,626 AUD|Low: $531 AUD|High: $1,712 AUD|Avg: $919 AUD|-5.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 2$531 AUD
Retailer 9$649 AUD
Retailer 7$758 AUD
Retailer 8$806 AUD
Retailer 3$874 AUD
Retailer 11$891 AUD
Retailer 5$914 AUD
Retailer 10$940 AUD
Retailer 4$974 AUD
Retailer 6$1,086 AUD
MOH London$1,626 AUD

37 data points across 11 retailers

10 retailers$531 AUD to $1,626 AUD

A
Cheapest Retailer
-
$531 AUD
₹35,410 INR
B+
Retailer 2
-
$649 AUD
$455 USD
View
Final sale: no returns
B+
Retailer 3
-
$758 AUD
$531 USD
View
B+
Retailer 4
-
$806 AUD
$565 USD
View
B
Retailer 5
-
$891 AUD
$624 USD
View
B
Retailer 6
-
$914 AUD
£504 GBP
View
B
Retailer 7
-
$940 AUD
$659 USD
View
B
Retailer 8
-
$974 AUD
€650 EUR
View
B
Retailer 9
-
$1,086 AUD
ZAR 12,297 ZAR
View
Most Expensive
B
MOH London
D356764C4 · Nov 2
$1,626 AUD
£897 GBP
View
9 more retailers have this diamond
Prices start from $531 AUDSave up to $1,095 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.

A
0.51ct Cushion
$531 AUD