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Round|Natural|IGI

1.03ct K SI1 Round Natural Diamond

EX • K/SI1 • IGI 747534602

Shape and cutting style on the report: Round brilliant

Certificate IGI 747534602

Diamond specifications and retailer prices

From £692 GBP
As of November 5, 2026
Save £2,646 GBP (79%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £4,574 GBP at MOH London · As of November 2, 2026
View at MOH London

About this 1.03ct natural round diamond

This 1.03ct natural round sits in the classic one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 747534602. Listed at 13 retailers as of November 5, 2026, with a 382% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.03
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle33.1°
Pavilion angle41.4°
OriginNatural
Grading LabIGI
CertificateIGI 747534602
Dimensions6.46 × 6.54 × 3.96 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
6.46 mm6.54 mm1.03 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 747534602
Side View
Table 59.0%Crown 33.1°Girdle: MediumPavilion 41.4°Culet: NoneDepth 60.8%

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 5
Current: £4,574 GBP|Low: £692 GBP|High: £4,574 GBP|Avg: £1,381 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 6£692 GBP
Retailer 4£836 GBP
Retailer 7£1,192 GBP
Retailer 2£1,195 GBP
Retailer 12£2,525 GBP
Retailer 11£2,623 GBP
Retailer 10£2,631 GBP
Retailer 3£2,735 GBP
Retailer 8£2,840 GBP
Retailer 9£3,155 GBP
Retailer 5£3,338 GBP
MOH London£4,574 GBP

42 data points across 12 retailers

13 retailers£692 GBP to £3,338 GBP

A
Cheapest Retailer
-
£692 GBP
A
Retailer 2
-
£836 GBP
View
A
Retailer 3
-
£958 GBP
View
A
Retailer 4
-
£1,192 GBP
View
B+
Retailer 5
-
£1,195 GBP
View
B
Retailer 6
-
£2,525 GBP
View
B
Retailer 7
-
£2,623 GBP
View
B
Retailer 8
-
£2,631 GBP
View
B
Retailer 9
-
£2,735 GBP
View
B
Retailer 10
-
£2,840 GBP
View
B
Retailer 11
-
£3,155 GBP
View
C
Retailer 12
-
£3,338 GBP
View
Most Expensive
MOH London
6F4DCA684 · Nov 2
£4,574 GBP
View
Price under review
12 more retailers have this diamond
Prices start from £692 GBPSave up to £2,646 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
1.03ct Round
£692 GBP