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Round|Natural|GIA

1.00ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 1563443794

Certificate GIA 1563443794

Diamond specifications and retailer prices

From £901 GBP
As of November 6, 2026
Save £2,164 GBP (71%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £4,442 GBP at MOH London · As of November 2, 2026
View at MOH London

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 1563443794. Listed at 13 retailers as of November 2, 2026, with a 240% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1563443794
Dimensions6.35 × 6.40 × 3.91 mm
L/W Ratio1.01
Culet sizeNone
Top View
6.35 mm6.40 mm1.00 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1563443794
Side View
Table 59.0%CrownGirdle: Slightly ThickPavilionCulet: 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: £4,442 GBP|Low: £901 GBP|High: £4,442 GBP|Avg: £1,768 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 2£901 GBP
Retailer 4£1,066 GBP
Retailer 5£1,334 GBP
Retailer 7£1,519 GBP
Retailer 6£1,528 GBP
Retailer 3£2,268 GBP
Retailer 13£2,451 GBP
Retailer 11£2,457 GBP
Retailer 10£2,555 GBP
Retailer 12£2,655 GBP
Retailer 8£2,758 GBP
Retailer 9£3,064 GBP
MOH London£4,442 GBP

22 data points across 13 retailers

13 retailers£901 GBP to £3,064 GBP

A
Cheapest Retailer
-
£901 GBP
A
Retailer 2
-
£1,066 GBP
View
B+
Retailer 3
-
£1,334 GBP
View
B+
Retailer 4
-
£1,519 GBP
View
B+
Retailer 5
-
£1,528 GBP
View
B
Retailer 6
-
£2,268 GBP
View
B
Retailer 7
-
£2,451 GBP
View
Final sale: no returns
B
Retailer 8
-
£2,457 GBP
View
B
Retailer 9
-
£2,555 GBP
View
B
Retailer 10
-
£2,655 GBP
View
B
Retailer 11
-
£2,758 GBP
View
B
Retailer 12
-
£3,064 GBP
View
Most Expensive
MOH London
22960E667 · Nov 2
£4,442 GBP
View
Price under review
12 more retailers have this diamond
Prices start from £901 GBPSave up to £2,164 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
£901 GBP