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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 $426 NZD
As of November 6, 2026
Save $940 NZD (69%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $1,365 NZD 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 $426 to $1,365, a $940 spread on the same certified stone. MOH London lists it at $1,365. 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $1,365 NZD|Low: $426 NZD|High: $1,391 NZD|Avg: $896 NZD|-1.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 7, 2026
Retailer 3$426 NZD
Retailer 2$787 NZD
Retailer 6$830 NZD
Retailer 5$922 NZD
Retailer 4$1,102 NZD
MOH London$1,365 NZD

39 data points across 6 retailers

6 retailers$426 NZD to $1,365 NZD

A
Cheapest Retailer
-
$426 NZD
B+
Retailer 2
-
$787 NZD
View
B+
Retailer 3
-
$830 NZD
View
B+
Retailer 4
-
$922 NZD
View
B
Retailer 5
-
$1,102 NZD
View
Most Expensive
B
MOH London
54919E442 · Nov 7
$1,365 NZD
£596 GBP
View
5 more retailers have this diamond
Prices start from $426 NZDSave up to $940 NZD

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
$426 NZD