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Round|Natural|IGI

1.03ct J SI1 Round Natural Diamond

EX • J/SI1 • IGI 772672908

Shape and cutting style on the report: Round brilliant

Certificate IGI 772672908

Diamond specifications and retailer prices

From £920 GBP
As of November 4, 2026
Save £2,067 GBP (69%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £2,987 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 772672908. Listed at 12 retailers as of November 2, 2026, with prices from £920 to £2,987, a £2,067 spread on the same certified stone. NZ Jewellers lists it at £2,987. 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
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle40.9°
OriginNatural
Grading LabIGI
CertificateIGI 772672908
Dimensions6.40 × 6.44 × 4.06 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
6.40 mm6.44 mm1.03 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 772672908
Side View
Table 56.0%Crown 36.3°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 63.2%

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 4
Current: £1,410 GBP|Low: £918 GBP|High: £2,171 GBP|Avg: £1,352 GBP|-1.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 4, 2026
Retailer 5£920 GBP
Retailer 3£1,086 GBP
Retailer 12£1,135 GBP
Retailer 10£1,137 GBP
Retailer 11£1,224 GBP
Retailer 4£1,242 GBP
Retailer 2£1,325 GBP
Retailer 6£1,373 GBP
Retailer 1£1,410 GBP
Retailer 9£1,494 GBP
Retailer 7£1,665 GBP
Retailer 8£2,144 GBP

27 data points across 12 retailers

12 retailers£920 GBP to £2,987 GBP

A
Cheapest Retailer
-
£920 GBP
A
Retailer 2
-
£1,135 GBP
View
A
Retailer 3
-
£1,137 GBP
View
Retailer 4
-
£1,224 GBP
View
Price last confirmed 8 days ago
B+
Retailer 5
-
£1,325 GBP
View
B+
Retailer 6
-
£1,373 GBP
View
B+
Retailer 7
-
£1,410 GBP
View
B+
Retailer 8
-
£1,412 GBP
View
B+
Retailer 9
-
£1,494 GBP
View
B+
Retailer 10
-
£1,665 GBP
View
B
Retailer 11
-
£2,144 GBP
View
Most Expensive
C
NZ Jewellers
f71f03d1-b2ee-4a47-833a-e6b693c13220 · Nov 2
£2,987 GBP
$4,020 USD
View
11 more retailers have this diamond
Prices start from £920 GBPSave up to £2,067 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
£920 GBP