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Round|Natural|GIA

1.00ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 7428069875

Certificate GIA 7428069875

Diamond specifications and retailer prices

From £1,277 GBP
As of November 6, 2026
Save £2,054 GBP (62%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £3,332 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7428069875. Listed at 18 retailers as of November 5, 2026, with prices from £1,277 to £3,332, a £2,054 spread on the same certified stone. NZ Jewellers lists it at £3,332. 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

1.00
Carat
J
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle34°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 7428069875
Dimensions6.41 × 6.44 × 3.94 mm
L/W Ratio1.00
Top View
6.41 mm6.44 mm1.00 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 7428069875
Side View
Table 62.0%Crown 34°Girdle: Slightly ThickPavilion 41.6°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: £1,858 GBP|Low: £1,144 GBP|High: £2,826 GBP|Avg: £1,721 GBP|+0.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 8£1,277 GBP
Retailer 9£1,304 GBP
Retailer 6£1,332 GBP
Retailer 7£1,510 GBP
Retailer 4£1,664 GBP
Retailer 3£1,721 GBP
Retailer 1£1,858 GBP
Retailer 2£2,021 GBP
Retailer 5£2,791 GBP

42 data points across 9 retailers

18 retailers£1,277 GBP to £3,332 GBP

A
Cheapest Retailer
-
£1,277 GBP
B+
Retailer 2
-
£1,300 GBP
View
B+
Retailer 3
-
£1,304 GBP
View
B+
Retailer 4
-
£1,332 GBP
View
Final sale: no returns
B+
Retailer 5
-
£1,357 GBP
View
B+
Retailer 6
-
£1,392 GBP
View
B+
Retailer 7
-
£1,444 GBP
View
Retailer 8
-
£1,444 GBP
View
Price last confirmed 8 days ago
B+
Retailer 9
-
£1,510 GBP
View
B
Retailer 10
-
£1,664 GBP
View
B
Retailer 11
-
£1,666 GBP
View
B+
Retailer 12
-
£1,721 GBP
View
B
Retailer 13
-
£1,834 GBP
View
B+
Retailer 14
-
£1,858 GBP
View
B
Retailer 15
-
£2,021 GBP
View
B
Retailer 16
-
£2,288 GBP
View
B
Retailer 17
-
£2,791 GBP
View
Most Expensive
B
NZ Jewellers
c5deb422-8764-4927-9c8c-61607f5a480d · Nov 5
£3,332 GBP
$4,484 USD
View
17 more retailers have this diamond
Prices start from £1,277 GBPSave up to £2,054 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
1.00ct Round
£1,277 GBP