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Round|Natural|GIA

0.51ct K I1 Round Natural Diamond

GD • K/I1 • GIA 1215571727

Certificate GIA 1215571727

Diamond specifications and retailer prices

From £327 GBP
As of November 5, 2026
Save £212 GBP (39%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £1,383 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 1215571727. Listed at 6 retailers as of November 5, 2026, with a 65% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
SymmetryExcellent
FluorescenceNone
Crown angle38.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 1215571727
Dimensions4.94 × 4.96 × 3.20 mm
L/W Ratio1.00
Star length55%
Lower girdle80%
Top View
4.94 mm4.96 mm0.51 ctK / I1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1215571727
Side View
Table 60.0%Crown 38.5°Girdle: STK-VTKPavilion 40.6°Culet: NoneDepth 64.5%

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: £1,383 GBP|Low: £327 GBP|High: £1,383 GBP|Avg: £530 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 5£327 GBP
Retailer 3£352 GBP
Retailer 7£352 GBP
Retailer 6£377 GBP
Retailer 4£399 GBP
Retailer 8£458 GBP
Retailer 2£539 GBP
Retailer 9£542 GBP
NZ Jewellers£1,383 GBP

22 data points across 9 retailers

6 retailers£327 GBP to £539 GBP

B+
Cheapest Retailer
-
£327 GBP
Retailer 2
-
£352 GBP
View
Price last confirmed 8 days ago
B
Retailer 3
-
£352 GBP
View
B
Retailer 4
-
£377 GBP
View
B
Retailer 5
-
£539 GBP
View
Most Expensive
NZ Jewellers
9177e7d1-9e29-46a6-8241-062d0df65cb9 · Nov 4
£1,383 GBP
$1,861 USD
View
Price under review
5 more retailers have this diamond
Prices start from £327 GBPSave up to £212 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
£327 GBP