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Round|Natural|IGI

0.51ct K I1 Round Natural Diamond

VG • K/I1 • IGI 497152358

Shape and cutting style on the report: Round brilliant

Certificate IGI 497152358

Diamond specifications and retailer prices

From £190 GBP
As of November 5, 2026
Save £670 GBP (78%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £860 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 very-good cut grade and certified by IGI 497152358. Listed at 8 retailers as of November 4, 2026, with prices from £190 to £860, a £670 spread on the same certified stone. NZ Jewellers lists it at £860. 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
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
Crown angle35.7°
Pavilion angle40.5°
OriginNatural
Grading LabIGI
CertificateIGI 497152358
Dimensions5.03 × 5.08 × 3.16 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
5.03 mm5.08 mm0.51 ctK / I1
OriginNatural
CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateIGI 497152358
Side View
Table 57.0%Crown 35.7°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 62.5%

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: £368 GBP|Low: £196 GBP|High: £371 GBP|Avg: £276 GBP|+1.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
November 5, 2026
Retailer 2£198 GBP
Retailer 3£256 GBP
Retailer 4£285 GBP
Retailer 1£368 GBP

15 data points across 4 retailers

8 retailers£190 GBP to £860 GBP

B+
Cheapest Retailer
-
£190 GBP
Retailer 2
-
£204 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
-
£256 GBP
View
B
Retailer 7
-
£368 GBP
View
Most Expensive
C
NZ Jewellers
e58b5b7c-254f-4e35-9904-b43e898f50c2 · Nov 4
£860 GBP
$1,158 USD
View
7 more retailers have this diamond
Prices start from £190 GBPSave up to £670 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