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Cushion|Natural|GIA

1.00ct I SI2 Cushion Natural Diamond

EX • I/SI2 • GIA 6425709135

Certificate GIA 6425709135

Diamond specifications and retailer prices

From £873 GBP
As of November 6, 2026
Save £899 GBP (51%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,772 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1ct natural cushion diamond

This 1ct natural cushion sits in the classic one-carat band, graded I 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 6425709135. Listed at 10 retailers as of November 4, 2026, with prices from £873 to £1,772, a £899 spread on the same certified stone. MOH London lists it at £1,772. 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
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6425709135
Dimensions5.48 × 5.41 × 3.74 mm
L/W Ratio1.01
Top View
5.48 mm5.41 mm1.00 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6425709135
Side View
Table 57.0%CrownGirdle: VTK-XTKPavilionCulet: NoneDepth 69.1%

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: £1,772 GBP|Low: £873 GBP|High: £1,798 GBP|Avg: £1,077 GBP|-1.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 7£873 GBP
Retailer 2£888 GBP
Retailer 8£895 GBP
Retailer 10£899 GBP
Retailer 3£954 GBP
Retailer 6£970 GBP
Retailer 9£1,035 GBP
Retailer 5£1,090 GBP
Retailer 4£1,346 GBP
MOH London£1,772 GBP

29 data points across 10 retailers

10 retailers£873 GBP to £1,772 GBP

A
Cheapest Retailer
-
£873 GBP
A
Retailer 2
-
£888 GBP
View
A
Retailer 3
-
£895 GBP
View
Final sale: no returns
A
Retailer 4
-
£899 GBP
View
A
Retailer 5
-
£954 GBP
View
Retailer 6
-
£970 GBP
View
Price last confirmed 8 days ago
A
Retailer 7
-
£1,035 GBP
View
A
Retailer 8
-
£1,090 GBP
View
B+
Retailer 9
-
£1,346 GBP
View
Most Expensive
B+
MOH London
F1C310B20 · Nov 4
£1,772 GBP
View
9 more retailers have this diamond
Prices start from £873 GBPSave up to £899 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 Cushion
£873 GBP