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Round|Natural|GIA

1.00ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 7526656191

Certificate GIA 7526656191

Diamond specifications and retailer prices

From £1,077 GBP
As of November 6, 2026
Save £2,067 GBP (66%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £3,144 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7526656191. Listed at 20 retailers as of November 5, 2026, with prices from £1,077 to £3,144, a £2,067 spread on the same certified stone. NZ Jewellers lists it at £3,144. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 7526656191
Dimensions6.38 × 6.34 × 3.99 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Crystal, Pinpoint
Top View
6.38 mm6.34 mm1.00 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 7526656191
Side View
Table 58.0%Crown 35.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 62.7%

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: £1,077 GBP|Low: £1,077 GBP|High: £2,662 GBP|Avg: £1,586 GBP|-3.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 1£1,077 GBP
Retailer 10£1,094 GBP
Retailer 2£1,358 GBP
Retailer 3£1,387 GBP
Retailer 4£1,419 GBP
Retailer 11£1,433 GBP
Retailer 5£1,520 GBP
Retailer 6£1,614 GBP
Retailer 7£1,835 GBP
Retailer 9£1,837 GBP
Retailer 8£2,627 GBP

28 data points across 11 retailers

20 retailers£1,077 GBP to £3,144 GBP

A
Cheapest Retailer
-
£1,077 GBP
A
Retailer 2
-
£1,094 GBP
View
B+
Retailer 3
-
£1,331 GBP
View
B+
Retailer 4
-
£1,358 GBP
View
B+
Retailer 5
-
£1,387 GBP
View
Final sale: no returns
B+
Retailer 6
-
£1,401 GBP
View
B+
Retailer 7
-
£1,419 GBP
View
B+
Retailer 8
-
£1,433 GBP
View
B+
Retailer 9
-
£1,504 GBP
View
Retailer 10
-
£1,504 GBP
View
Price last confirmed 8 days ago
B+
Retailer 11
-
£1,520 GBP
View
B+
Retailer 12
-
£1,527 GBP
View
B+
Retailer 13
-
£1,606 GBP
View
B+
Retailer 14
-
£1,614 GBP
View
B
Retailer 15
-
£1,735 GBP
View
B+
Retailer 16
-
£1,835 GBP
View
B+
Retailer 17
-
£1,837 GBP
View
Retailer 18
-
£1,854 GBP
View
Price last confirmed 32 days ago
B
Retailer 19
-
£2,627 GBP
View
Most Expensive
B
NZ Jewellers
2a0b8fc2-4073-4b2e-ae37-93bc25de2e8c · Nov 5
£3,144 GBP
$4,231 USD
View
19 more retailers have this diamond
Prices start from £1,077 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
1.00ct Round
£1,077 GBP