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Round|Natural|IGI

1.03ct K SI1 Round Natural Diamond

EX • K/SI1 • IGI 843680328

Shape and cutting style on the report: Round brilliant

Certificate IGI 843680328

Diamond specifications and retailer prices

From £780 GBP
As of November 1, 2026
Save £1,308 GBP (63%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £2,089 GBP at NZ Jewellers · As of November 2, 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 843680328. Listed at 15 retailers as of November 1, 2026, with prices from £780 to £2,089, a £1,308 spread on the same certified stone. NZ Jewellers lists it at £2,089. 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
FluorescenceNone
Crown angle35.9°
Pavilion angle40.8°
OriginNatural
Grading LabIGI
CertificateIGI 843680328
Dimensions6.43 × 6.40 × 4.05 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
6.43 mm6.40 mm1.03 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 843680328
Side View
Table 59.0%Crown 35.9°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.9%

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 1
Current: £1,005 GBP|Low: £821 GBP|High: £1,202 GBP|Avg: £938 GBP|-1.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 4, 2026
Retailer 2£821 GBP
Retailer 6£821 GBP
Retailer 3£822 GBP
Retailer 9£857 GBP
Retailer 10£889 GBP
Retailer 8£955 GBP
Retailer 5£1,003 GBP
Retailer 1£1,005 GBP
Retailer 7£1,045 GBP
Retailer 4£1,195 GBP

16 data points across 10 retailers

15 retailers£780 GBP to £2,089 GBP

A
Cheapest Retailer
-
£780 GBP
A
Retailer 2
-
£821 GBP
View
A
Retailer 3
-
£821 GBP
View
A
Retailer 4
-
£822 GBP
View
A
Retailer 5
-
£840 GBP
View
Retailer 6
-
£857 GBP
View
Price last confirmed 8 days ago
Retailer 7
-
£857 GBP
View
Price last confirmed 8 days ago
A
Retailer 8
-
£889 GBP
View
Retailer 9
-
£889 GBP
View
Price last confirmed 8 days ago
A
Retailer 10
-
£955 GBP
View
B+
Retailer 11
-
£1,003 GBP
View
A
Retailer 12
-
£1,005 GBP
View
B+
Retailer 13
-
£1,045 GBP
View
A
Retailer 14
-
£1,195 GBP
View
Most Expensive
B
NZ Jewellers
a99e7a8a-d8b4-41cd-a0ea-3dc776b9a62e · Nov 2
£2,089 GBP
$2,811 USD
View
14 more retailers have this diamond
Prices start from £780 GBPSave up to £1,308 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
£780 GBP