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Round|Natural|GIA

0.51ct K I1 Round Natural Diamond

GD • K/I1 • GIA 3245397346

Certificate GIA 3245397346

Diamond specifications and retailer prices

From £319 GBP
As of November 5, 2026
Save £1,028 GBP (76%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £1,347 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 I1 clarity (included), with a standard cut grade and certified by GIA 3245397346. Listed at 6 retailers as of November 4, 2026, with prices from £319 to £1,347, a £1,028 spread on the same certified stone. NZ Jewellers lists it at £1,347. 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
I1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle38°
Pavilion angle40.4°
OriginNatural
Grading LabGIA
CertificateGIA 3245397346
Dimensions4.91 × 4.93 × 3.23 mm
L/W Ratio1.00
Star length50%
Lower girdle85%
Top View
4.91 mm4.93 mm0.51 ctK / I1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 3245397346
Side View
Table 57.0%Crown 38°Girdle: THK-VTKPavilion 40.4°Culet: NoneDepth 65.7%

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: £1,347 GBP|Low: £319 GBP|High: £1,347 GBP|Avg: £518 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 5£319 GBP
Retailer 3£343 GBP
Retailer 7£343 GBP
Retailer 6£368 GBP
Retailer 4£389 GBP
Retailer 8£452 GBP
Retailer 2£526 GBP
Retailer 9£528 GBP
NZ Jewellers£1,347 GBP

22 data points across 9 retailers

6 retailers£319 GBP to £1,347 GBP

B+
Cheapest Retailer
-
£319 GBP
Retailer 2
-
£343 GBP
View
Price last confirmed 8 days ago
B
Retailer 3
-
£343 GBP
View
B
Retailer 4
-
£368 GBP
View
B
Retailer 5
-
£526 GBP
View
Most Expensive
C
NZ Jewellers
702d8868-f5f1-4f1a-8092-4103ee61c4f8 · Nov 4
£1,347 GBP
$1,813 USD
View
5 more retailers have this diamond
Prices start from £319 GBPSave up to £1,028 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
£319 GBP