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Round|Natural|IGI

0.51ct N SI2 Round Natural Diamond

EX • N/SI2 • IGI 167508072

Shape and cutting style on the report: Round brilliant

Certificate IGI 167508072

Diamond specifications and retailer prices

From £190 GBP
As of November 5, 2026
Save £672 GBP (78%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £863 GBP at NZ Jewellers · As of November 4, 2026
View at NZ Jewellers

About this 0.51ct natural round diamond

This 0.51ct natural round sits in the half to three-quarter carat band, graded N colour (tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 167508072. Listed at 8 retailers as of November 4, 2026, with prices from £190 to £863, a £672 spread on the same certified stone. NZ Jewellers lists it at £863. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.51
Carat
N
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle33.5°
Pavilion angle40.3°
OriginNatural
Grading LabIGI
CertificateIGI 167508072
Dimensions5.15 × 5.19 × 3.09 mm
L/W Ratio1.01
Culet sizeMedium
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
5.15 mm5.19 mm0.51 ctN / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI 167508072
Side View
Table 58.0%Crown 33.5°Girdle: MED-STKPavilion 40.3°Culet: MediumDepth 59.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £320 GBP|Low: £250 GBP|High: £324 GBP|Avg: £286 GBP|+0.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
November 5, 2026
Retailer 4£250 GBP
Retailer 3£285 GBP
Retailer 2£287 GBP
Retailer 1£320 GBP

15 data points across 4 retailers

8 retailers£190 GBP to £863 GBP

B+
Cheapest Retailer
-
£190 GBP
Retailer 2
-
£205 GBP
View
Price last confirmed 8 days ago
B+
Retailer 3
-
£212 GBP
View
B+
Retailer 4
-
£250 GBP
View
B+
Retailer 5
-
£256 GBP
View
B+
Retailer 6
-
£287 GBP
View
B
Retailer 7
-
£320 GBP
View
Most Expensive
C
NZ Jewellers
04379757-64e1-4b5a-a549-79569f775328 · Nov 4
£863 GBP
$1,161 USD
View
7 more retailers have this diamond
Prices start from £190 GBPSave up to £672 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.

B+
0.51ct Round
£190 GBP