Radiant|Natural|IGI

0.51ct K SI1 Radiant Natural Diamond

VG • K/SI1 • IGI 741597007

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI 741597007

Diamond specifications and retailer prices

From $236 USD
As of November 6, 2026
Save $521 USD (69%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $757 USD at MOH London · As of November 7, 2026
View at MOH London

About this 0.51ct natural radiant diamond

This 0.51ct natural radiant sits in the half to three-quarter carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 741597007. Listed at 6 retailers as of November 6, 2026, with prices from $236 to $757, a $521 spread on the same certified stone. MOH London lists it at $757. 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
K
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle46.1°
Pavilion angle32.5°
OriginNatural
Grading LabIGI
CertificateIGI 741597007
Dimensions5.02 × 3.89 × 2.88 mm
L/W Ratio1.29
Culet sizePointed
Top View
5.02 mm3.89 mm0.51 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateIGI 741597007
Side View
Table 63.0%Crown 46.1°Girdle: ThickPavilion 32.5°Culet: NoneDepth 74.0%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: $757 USD|Low: $236 USD|High: $771 USD|Avg: $497 USD|-1.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 7, 2026
Retailer 3$236 USD
Retailer 2$436 USD
Retailer 6$460 USD
Retailer 5$511 USD
Retailer 4$611 USD
MOH London$757 USD

39 data points across 6 retailers

6 retailers$236 USD to $757 USD

A
Cheapest Retailer
-
$236 USD
B+
Retailer 2
-
$436 USD
View
B+
Retailer 3
-
$460 USD
View
B+
Retailer 4
-
$511 USD
View
B
Retailer 5
-
$611 USD
View
Most Expensive
B
MOH London
54919E442 · Nov 7
$757 USD
£596 GBP
View
5 more retailers have this diamond
Prices start from $236 USDSave up to $521 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 Radiant
$236 USD