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Round|Natural|GIA

0.51ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 2397005218

Certificate GIA 2397005218

Diamond specifications and retailer prices

From £247 GBP
As of November 5, 2026
Save £701 GBP (74%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £949 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 K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2397005218. Listed at 11 retailers as of November 4, 2026, with prices from £247 to £949, a £701 spread on the same certified stone. NZ Jewellers lists it at £949. 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
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2397005218
Dimensions5.09 × 5.05 × 3.20 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
5.09 mm5.05 mm0.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2397005218
Side View
Table 56.0%Crown 36.5°Girdle: Sli. ThickPavilion 41°Culet: NoneDepth 63.3%

Caratlytics Score

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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 5
Current: £949 GBP|Low: £247 GBP|High: £967 GBP|Avg: £404 GBP|-1.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 11£247 GBP
Retailer 8£267 GBP
Retailer 3£271 GBP
Retailer 9£276 GBP
Retailer 7£296 GBP
Retailer 2£314 GBP
Retailer 10£333 GBP
Retailer 4£356 GBP
Retailer 12£396 GBP
Retailer 5£458 GBP
Retailer 6£571 GBP
NZ Jewellers£949 GBP

44 data points across 12 retailers

11 retailers£247 GBP to £949 GBP

A
Cheapest Retailer
-
£247 GBP
Retailer 2
-
£267 GBP
View
Price last confirmed 8 days ago
A
Retailer 3
-
£276 GBP
View
A
Retailer 4
-
£296 GBP
View
A
Retailer 5
-
£314 GBP
View
B+
Retailer 6
-
£333 GBP
View
B+
Retailer 7
-
£356 GBP
View
B+
Retailer 8
-
£396 GBP
View
B+
Retailer 9
-
£458 GBP
View
B+
Retailer 10
-
£571 GBP
View
Most Expensive
C
NZ Jewellers
fef7c7c6-ef8f-4fad-bd92-ac9859a163fb · Nov 4
£949 GBP
$1,277 USD
View
10 more retailers have this diamond
Prices start from £247 GBPSave up to £701 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 Round
£247 GBP