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Oval|Natural|GIA

1.00ct J SI2 Oval Natural Diamond

EX • J/SI2 • GIA 2564190909

Certificate GIA 2564190909

Diamond specifications and retailer prices

From £911 GBP
As of November 4, 2026
Save £723 GBP (44%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,634 GBP at Helzberg Diamonds · As of November 6, 2026
View at Helzberg Diamonds

About this 1ct natural oval diamond

This 1ct natural oval sits in the classic one-carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2564190909. Listed at 10 retailers as of November 4, 2026, with prices from £911 to £1,634, a £723 spread on the same certified stone. Helzberg Diamonds lists it at £1,634. 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 (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle40.15°
Pavilion angle39.64°
OriginNatural
Grading LabGIA
CertificateGIA 2564190909
Dimensions7.78 × 5.58 × 3.47 mm
L/W Ratio1.39
Culet sizeNone
Top View
7.78 mm5.58 mm1.00 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2564190909
Side View
Table 60.0%Crown 40.15°Girdle: MED-THKPavilion 39.64°Culet: NoneDepth 62.1%

Caratlytics Score

How it works →
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 4
Current: £1,634 GBP|Low: £908 GBP|High: £2,013 GBP|Avg: £1,175 GBP|-2.9%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 9£911 GBP
Retailer 8£911 GBP
Retailer 11£926 GBP
Retailer 7£941 GBP
Retailer 12£991 GBP
Retailer 5£1,024 GBP
Retailer 2£1,028 GBP
Retailer 10£1,113 GBP
Retailer 3£1,286 GBP
Retailer 4£1,349 GBP
Retailer 6£1,510 GBP
Helzberg Diamonds£1,634 GBP

31 data points across 12 retailers

10 retailers£911 GBP to £1,634 GBP

A
Cheapest Retailer
-
£911 GBP
A
Retailer 2
-
£926 GBP
View
Retailer 3
-
£941 GBP
View
Price last confirmed 19 days ago
A
Retailer 4
-
£991 GBP
View
A
Retailer 5
-
£1,024 GBP
View
B+
Retailer 6
-
£1,028 GBP
View
A
Retailer 7
-
£1,113 GBP
View
B+
Retailer 8
-
£1,286 GBP
View
B+
Retailer 9
-
£1,510 GBP
View
Most Expensive
B
Helzberg Diamonds
XZRILMKHPGPGP · Nov 6
£1,634 GBP
$2,187 USD
View
9 more retailers have this diamond
Prices start from £911 GBPSave up to £723 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 Oval
£911 GBP