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5.03ct M SI1 Round Natural Diamond

EX • M/SI1 • IGI 670479030

Shape and cutting style on the report: Round brilliant

Certificate IGI 670479030

Diamond specifications and retailer prices

From £28,158 GBP
As of November 4, 2026
Save £6,636 GBP (19%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £34,794 GBP at Aurelinne · As of November 5, 2026
View at Aurelinne

About this 5.03ct natural round diamond

This 5.03ct natural round sits in the over five carat band, graded M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 670479030. Listed at 11 retailers as of November 4, 2026, with prices from £28,158 to £34,794, a £6,636 spread on the same certified stone. Aurelinne lists it at £34,794. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

5.03
Carat
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.5°
Pavilion angle41.3°
OriginNatural
Grading LabIGI
CertificateIGI 670479030
Dimensions11.00 × 11.06 × 6.71 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
11.00 mm11.06 mm5.03 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 670479030
Side View
Table 60.0%Crown 32.5°Girdle: MED-STKPavilion 41.3°Culet: NoneDepth 60.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £34,794 GBP|Low: £27,662 GBP|High: £54,124 GBP|Avg: £33,328 GBP
Aurelinne
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 13£27,662 GBP
Retailer 12£28,158 GBP
Retailer 10£29,187 GBP
Retailer 5£29,987 GBP
Retailer 11£30,928 GBP
Retailer 2£31,489 GBP
Retailer 8£32,217 GBP
Retailer 7£32,746 GBP
Retailer 9£33,505 GBP
Retailer 6£33,667 GBP
Retailer 3£34,440 GBP
Aurelinne£34,794 GBP
Retailer 4£54,124 GBP

39 data points across 13 retailers

11 retailers£28,158 GBP to £34,794 GBP

B+
Cheapest Retailer
-
£28,158 GBP
B+
Retailer 2
-
£29,187 GBP
View
B+
Retailer 3
-
£29,987 GBP
View
Retailer 4
-
£30,928 GBP
View
Price last confirmed 8 days ago
B+
Retailer 5
-
£31,489 GBP
View
B+
Retailer 6
-
£32,217 GBP
View
B+
Retailer 7
-
£32,746 GBP
View
B
Retailer 8
-
£33,505 GBP
View
B
Retailer 9
-
£33,667 GBP
View
B
Retailer 10
-
£34,440 GBP
View
Most Expensive
B
Aurelinne
16068403-7417-4ff4-bdf0-6f3f3c75466a · Nov 5
£34,794 GBP
$46,830 USD
View
10 more retailers have this diamond
Prices start from £28,158 GBPSave up to £6,636 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+
5.03ct Round
£28,158 GBP