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Round|Natural|IGI

0.51ct K SI2 Round Natural Diamond

VG • K/SI2 • IGI 660497001

Shape and cutting style on the report: Round brilliant

Certificate IGI 660497001

Diamond specifications and retailer prices

From £188 GBP
As of November 5, 2026
Save £663 GBP (78%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £851 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 very-good cut grade and certified by IGI 660497001. Listed at 10 retailers as of November 4, 2026, with prices from £188 to £851, a £663 spread on the same certified stone. NZ Jewellers lists it at £851. 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
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceFaint
Crown angle34°
Pavilion angle40.1°
OriginNatural
Grading LabIGI
CertificateIGI 660497001
Dimensions5.07 × 5.05 × 3.12 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Top View
5.07 mm5.05 mm0.51 ctK / SI2
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateIGI 660497001
Side View
Table 58.0%Crown 34°Girdle: STK-THKPavilion 40.1°Culet: NoneDepth 61.6%

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: £197 GBP|Low: £194 GBP|High: £438 GBP|Avg: £289 GBP|-1.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 4, 2026
Retailer 4£195 GBP
Retailer 1£197 GBP
Retailer 5£253 GBP
Retailer 8£282 GBP
Retailer 7£285 GBP
Retailer 3£324 GBP
Retailer 6£341 GBP
Retailer 2£432 GBP

22 data points across 8 retailers

10 retailers£188 GBP to £851 GBP

B+
Cheapest Retailer
-
£188 GBP
B+
Retailer 2
-
£197 GBP
View
Retailer 3
-
£202 GBP
View
Price last confirmed 8 days ago
B+
Retailer 4
-
£210 GBP
View
B+
Retailer 5
-
£253 GBP
View
B+
Retailer 6
-
£253 GBP
View
B+
Retailer 7
-
£285 GBP
View
B+
Retailer 8
-
£324 GBP
View
B+
Retailer 9
-
£432 GBP
View
Most Expensive
C
NZ Jewellers
57bb5c08-ad8c-44d9-9924-1c4132c678f2 · Nov 4
£851 GBP
$1,145 USD
View
9 more retailers have this diamond
Prices start from £188 GBPSave up to £663 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
£188 GBP