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Round|Natural|IGI

1.03ct I SI1 Round Natural Diamond

EX • I/SI1 • IGI 754512609

Shape and cutting style on the report: Round brilliant

Certificate IGI 754512609

Diamond specifications and retailer prices

From £1,242 GBP
As of November 6, 2026
Save £2,101 GBP (63%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £3,343 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 754512609. Listed at 21 retailers as of November 5, 2026, with prices from £1,242 to £3,343, a £2,101 spread on the same certified stone. NZ Jewellers lists it at £3,343. 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
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.4°
Pavilion angle41.8°
OriginNatural
Grading LabIGI
CertificateIGI 754512609
Dimensions6.49 × 6.53 × 3.99 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
6.49 mm6.53 mm1.03 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 754512609
Side View
Table 59.0%Crown 31.4°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 61.3%

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: Nov 6
Current: £3,343 GBP|Low: £1,242 GBP|High: £3,343 GBP|Avg: £1,844 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
November 6, 2026
Retailer 2£1,242 GBP
Retailer 10£1,404 GBP
Retailer 9£1,444 GBP
Retailer 11£1,476 GBP
Retailer 18£1,490 GBP
Retailer 13£1,530 GBP
Retailer 5£1,599 GBP
Retailer 7£1,599 GBP
Retailer 21£1,612 GBP
Retailer 3£1,625 GBP
Retailer 6£1,673 GBP
Retailer 4£1,702 GBP
Retailer 8£1,756 GBP
Retailer 19£1,757 GBP
Retailer 16£1,835 GBP
Retailer 12£1,845 GBP
Retailer 17£1,952 GBP
Retailer 15£2,123 GBP
Retailer 14£2,401 GBP
Retailer 20£2,794 GBP
NZ Jewellers£3,343 GBP

21 data points across 21 retailers

21 retailers£1,242 GBP to £3,343 GBP

A
Cheapest Retailer
-
£1,242 GBP
A
Retailer 2
-
£1,404 GBP
View
A
Retailer 3
-
£1,444 GBP
View
A
Retailer 4
-
£1,476 GBP
View
Final sale: no returns
A
Retailer 5
-
£1,490 GBP
View
A
Retailer 6
-
£1,530 GBP
View
A
Retailer 7
-
£1,599 GBP
View
Retailer 8
-
£1,599 GBP
View
Price last confirmed 8 days ago
B+
Retailer 9
-
£1,612 GBP
View
A
Retailer 10
-
£1,625 GBP
View
A
Retailer 11
-
£1,673 GBP
View
B+
Retailer 12
-
£1,702 GBP
View
B+
Retailer 13
-
£1,756 GBP
View
A
Retailer 14
-
£1,757 GBP
View
B+
Retailer 15
-
£1,835 GBP
View
B+
Retailer 16
-
£1,845 GBP
View
B+
Retailer 17
-
£1,952 GBP
View
B+
Retailer 18
-
£2,123 GBP
View
B
Retailer 19
-
£2,401 GBP
View
B
Retailer 20
-
£2,794 GBP
View
Most Expensive
B
NZ Jewellers
8a27d3b3-6ae1-4384-927b-ca29b6703e37 · Nov 5
£3,343 GBP
$4,500 USD
View
20 more retailers have this diamond
Prices start from £1,242 GBPSave up to £2,101 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
£1,242 GBP