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Round|Natural|IGI

0.51ct E I1 Round Natural Diamond

EX • E/I1 • IGI 274738077

Shape and cutting style on the report: Round brilliant

Certificate IGI 274738077

Diamond specifications and retailer prices

From £300 GBP
$399 USD
As of October 28, 2026
Save £848 GBP (74%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £1,147 GBP at NZ Jewellers · As of October 30, 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 E colour (colourless) and I1 clarity (included), with a top-tier cut grade and certified by IGI 274738077. Listed at 7 retailers as of October 28, 2026, with prices from £300 to £1,147, a £848 spread on the same certified stone. NZ Jewellers lists it at £1,147. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

0.51
Carat
E
Colour
I1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle40.7°
OriginNatural
Grading LabIGI
CertificateIGI 274738077
Dimensions5.09 × 5.13 × 3.18 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
5.09 mm5.13 mm0.51 ctE / I1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 274738077
Side View
Table 56.0%Crown 36.4°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 62.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: £486 GBP|Low: £322 GBP|High: £486 GBP|Avg: £419 GBP|+4.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
October 30, 2026
Retailer 2£327 GBP
Retailer 3£424 GBP
Retailer 4£450 GBP
Retailer 1£486 GBP

20 data points across 4 retailers

7 retailers£300 GBP to £1,147 GBP

A
Cheapest Retailer
-
£300 GBP
$399 USD
A
Retailer 2
-
£322 GBP
$429 USD
View
A
Retailer 3
-
£322 GBP
$429 USD
View
A
Retailer 4
-
£345 GBP
$460 USD
View
B+
Retailer 5
-
£424 GBP
$565 USD
View
B+
Retailer 6
-
£486 GBP
€616 EUR
View
Most Expensive
C
NZ Jewellers
ebe31410-8f7a-4dd7-9fa4-3b6dc0c0339e · Oct 30
£1,147 GBP
$1,528 USD
View
6 more retailers have this diamond
Prices start from £300 GBPSave up to £848 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
£300 GBP