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Round|Natural|IGI

0.51ct K IF Round Natural Diamond

EX • K/IF • IGI 502190811

Shape and cutting style on the report: Round brilliant

Certificate IGI 502190811

Diamond specifications and retailer prices

From £393 GBP
As of November 4, 2026
Save £450 GBP (53%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,400 GBP at NZ Jewellers · As of October 17, 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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI 502190811. Listed at 14 retailers as of November 4, 2026, with a 114% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Flawless clarity in sub-one-carat stones is rarely visible to the naked eye over VS1, so you are paying a meaningful premium for grade rather than appearance.

The 4Cs

0.51
Carat
K
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle41.5°
OriginNatural
Grading LabIGI
CertificateIGI 502190811
Dimensions5.12 × 5.16 × 3.16 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
5.12 mm5.16 mm0.51 ctK / IF
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 502190811
Side View
Table 59.5%Crown 34.4°GirdlePavilion 41.5°Culet: NoneDepth 61.5%

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 4
Current: £467 GBP|Low: £398 GBP|High: £854 GBP|Avg: £533 GBP|+6.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 7£398 GBP
Retailer 2£443 GBP
Retailer 1£467 GBP
Retailer 6£516 GBP
Retailer 5£547 GBP
Retailer 3£566 GBP
Retailer 4£843 GBP

34 data points across 7 retailers

14 retailers£393 GBP to £843 GBP

Retailer 1
-
£366 GBP
Price last confirmed 20 days ago
Retailer 2
-
£393 GBP
View
Price last confirmed 21 days ago
A
Retailer 3
-
£393 GBP
View
Retailer 4
-
£393 GBP
View
Price last confirmed 22 days ago
Retailer 5
-
£393 GBP
View
Price last confirmed 8 days ago
Retailer 6
-
£421 GBP
View
Price last confirmed 19 days ago
A
Retailer 7
-
£443 GBP
View
B+
Retailer 8
-
£462 GBP
View
B+
Retailer 9
-
£467 GBP
View
B+
Retailer 10
-
£516 GBP
View
B+
Retailer 11
-
£547 GBP
View
B+
Retailer 12
-
£566 GBP
View
B
Retailer 13
-
£843 GBP
View
Most Expensive
NZ Jewellers
7572497d-371a-432a-b957-4212bf7a4aaf · Oct 17
£1,400 GBP
$1,884 USD
View
Price last confirmed 20 days ago
13 more retailers have this diamond
Prices start from £393 GBPSave up to £450 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
£393 GBP