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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 $372 USD
₹35,421 INR
As of November 1, 2026
Save $767 USD (67%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,139 USD at MOH London · As of November 1, 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 11 retailers as of November 1, 2026, with prices from $372 to $1,139, a $767 spread on the same certified stone. MOH London lists it at $1,139. 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
Color
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 1
Current: $1,139 USD|Low: $372 USD|High: $1,200 USD|Avg: $644 USD|-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 1, 2026
Retailer 2$372 USD
Retailer 9$455 USD
Retailer 7$531 USD
Retailer 8$565 USD
Retailer 3$613 USD
Retailer 11$624 USD
Retailer 4$640 USD
Retailer 10$659 USD
Retailer 5$679 USD
Retailer 6$761 USD
MOH London$1,139 USD

37 data points across 11 retailers

11 retailers$372 USD to $1,139 USD

A
Cheapest Retailer
-
$372 USD
₹35,421 INR
B+
Retailer 2
-
$455 USD
View
Final sale: no returns
B+
Retailer 3
-
$531 USD
View
B+
Retailer 4
-
$565 USD
View
Retailer 5
-
$613 USD
£482 GBP
View
Price last confirmed 32 days ago
B
Retailer 6
-
$624 USD
View
B
Retailer 7
-
$640 USD
£504 GBP
View
B
Retailer 8
-
$659 USD
View
B
Retailer 9
-
$679 USD
€647 EUR
View
B
Retailer 10
-
$761 USD
ZAR 12,297 ZAR
View
Most Expensive
B
MOH London
D356764C4 · Nov 1
$1,139 USD
£897 GBP
View
10 more retailers have this diamond
Prices start from $372 USDSave up to $767 USD

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
$372 USD