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Round|Natural|IGI

1.03ct K SI1 Round Natural Diamond

EX • K/SI1 • IGI 648418582

Shape and cutting style on the report: Round brilliant

Certificate IGI 648418582

Diamond specifications and retailer prices

From £906 GBP
As of November 4, 2026
Save £1,479 GBP (62%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £2,386 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

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 648418582. Listed at 15 retailers as of November 4, 2026, with prices from £906 to £2,386, a £1,479 spread on the same certified stone. NZ Jewellers lists it at £2,386. 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 angle33.7°
Pavilion angle41.6°
OriginNatural
Grading LabIGI
CertificateIGI 648418582
Dimensions6.49 × 6.44 × 4.02 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
6.49 mm6.44 mm1.03 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 648418582
Side View
Table 57.0%Crown 33.7°Girdle: MediumPavilion 41.6°Culet: NoneDepth 62.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: £935 GBP|Low: £906 GBP|High: £1,813 GBP|Avg: £1,137 GBP|-1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 8£906 GBP
Retailer 6£925 GBP
Retailer 1£935 GBP
Retailer 9£1,023 GBP
Retailer 7£1,062 GBP
Retailer 2£1,118 GBP
Retailer 4£1,193 GBP
Retailer 3£1,195 GBP
Retailer 5£1,787 GBP

41 data points across 9 retailers

15 retailers£906 GBP to £2,386 GBP

A
Cheapest Retailer
-
£906 GBP
A
Retailer 2
-
£925 GBP
View
A
Retailer 3
-
£935 GBP
View
A
Retailer 4
-
£964 GBP
View
Retailer 5
-
£979 GBP
View
Price last confirmed 8 days ago
A
Retailer 6
-
£979 GBP
View
A
Retailer 7
-
£1,023 GBP
View
A
Retailer 8
-
£1,062 GBP
View
A
Retailer 9
-
£1,078 GBP
View
A
Retailer 10
-
£1,118 GBP
View
B+
Retailer 11
-
£1,129 GBP
View
A
Retailer 12
-
£1,193 GBP
View
A
Retailer 13
-
£1,195 GBP
View
B
Retailer 14
-
£1,787 GBP
View
Most Expensive
B
NZ Jewellers
f45d1d6c-b963-4e77-8cbb-49c732f40dcc · Nov 5
£2,386 GBP
$3,211 USD
View
14 more retailers have this diamond
Prices start from £906 GBPSave up to £1,479 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
£906 GBP