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Cushion|Natural|IGI

0.51ct I SI1 Cushion Natural Diamond

VG • I/SI1 • IGI 749531621

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI 749531621

Diamond specifications and retailer prices

From £236 GBP
₹30,188 INR
As of November 2, 2026
Save £506 GBP (68%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £742 GBP 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 749531621. Listed at 7 retailers as of November 1, 2026, with prices from £236 to £742, a £506 spread on the same certified stone. MOH London lists it at £742. 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
PolishVery Good
SymmetryGood
FluorescenceFaint
Crown angle35.3°
Pavilion angle36.8°
OriginNatural
Grading LabIGI
CertificateIGI 749531621
Dimensions4.70 × 4.29 × 3.06 mm
L/W Ratio1.10
Girdle conditionFaceted
Culet sizeNone
Top View
4.70 mm4.29 mm0.51 ctI / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryGood
FluorescenceFaint
CertificateIGI 749531621
Side View
Table 58.0%Crown 35.3°Girdle: STK-VTKPavilion 36.8°Culet: NoneDepth 71.3%

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: £742 GBP|Low: £236 GBP|High: £769 GBP|Avg: £464 GBP|-2.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 2£236 GBP
Retailer 3£414 GBP
Retailer 6£419 GBP
Retailer 7£449 GBP
Retailer 4£489 GBP
Retailer 5£496 GBP
MOH London£742 GBP

42 data points across 7 retailers

7 retailers£236 GBP to £742 GBP

A
Cheapest Retailer
-
£236 GBP
₹30,188 INR
B+
Retailer 2
-
£414 GBP
View
B+
Retailer 3
-
£419 GBP
$562 USD
View
B
Retailer 4
-
£449 GBP
$603 USD
View
B
Retailer 5
-
£489 GBP
€625 EUR
View
B
Retailer 6
-
£496 GBP
ZAR 10,749 ZAR
View
Most Expensive
B
MOH London
C3E14B904 · Nov 1
£742 GBP
View
6 more retailers have this diamond
Prices start from £236 GBPSave up to £506 GBP

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
£236 GBP