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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 €331 EUR
₹35,410 INR
As of November 2, 2026
Save €684 EUR (67%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: €1,016 EUR 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 €331 to €1,016, a €684 spread on the same certified stone. MOH London lists it at €1,016. 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: €1,016 EUR|Low: €331 EUR|High: €1,070 EUR|Avg: €575 EUR|-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€331 EUR
Retailer 9€406 EUR
Retailer 7€473 EUR
Retailer 8€504 EUR
Retailer 3€546 EUR
Retailer 11€557 EUR
Retailer 5€571 EUR
Retailer 10€588 EUR
Retailer 4€609 EUR
Retailer 6€679 EUR
MOH London€1,016 EUR

37 data points across 11 retailers

10 retailers€331 EUR to €1,016 EUR

A
Cheapest Retailer
-
€331 EUR
₹35,410 INR
B+
Retailer 2
-
€406 EUR
$455 USD
View
Final sale: no returns
B+
Retailer 3
-
€473 EUR
$531 USD
View
B+
Retailer 4
-
€504 EUR
$565 USD
View
B
Retailer 5
-
€557 EUR
$624 USD
View
B
Retailer 6
-
€571 EUR
£504 GBP
View
B
Retailer 7
-
€588 EUR
$659 USD
View
B
Retailer 8
-
€609 EUR
View
B
Retailer 9
-
€679 EUR
ZAR 12,297 ZAR
View
Most Expensive
B
MOH London
D356764C4 · Nov 2
€1,016 EUR
£897 GBP
View
9 more retailers have this diamond
Prices start from €331 EURSave up to €684 EUR

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
€331 EUR