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Cushion|Natural|GIA

1.00ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 6555228607

Certificate GIA 6555228607

Diamond specifications and retailer prices

From £751 GBP
As of November 6, 2026
Save £258 GBP (26%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £1,009 GBP at GemTrove · As of November 6, 2026
View at GemTrove

About this 1ct natural cushion diamond

This 1ct natural cushion sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6555228607. Listed at 7 retailers as of November 6, 2026, with prices from £751 to £1,009, a £258 spread on the same certified stone. GemTrove lists it at £1,009. 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 (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555228607
Dimensions5.56 × 5.44 × 3.70 mm
L/W Ratio1.02
Top View
5.56 mm5.44 mm1.00 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555228607
Side View
Table 61.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 68.0%

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 6
Current: £1,009 GBP|Low: £671 GBP|High: £1,018 GBP|Avg: £855 GBP
GemTrove
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 7£751 GBP
Retailer 4£753 GBP
Retailer 3£784 GBP
Retailer 2£825 GBP
Retailer 6£857 GBP
Retailer 5£922 GBP
GemTrove£1,009 GBP

40 data points across 7 retailers

7 retailers£751 GBP to £1,009 GBP

A
Cheapest Retailer
-
£751 GBP
A
Retailer 2
-
£753 GBP
View
Final sale: no returns
A
Retailer 3
-
£784 GBP
View
A
Retailer 4
-
£825 GBP
View
A
Retailer 5
-
£857 GBP
View
A
Retailer 6
-
£922 GBP
View
Most Expensive
B+
GemTrove
GT-N-00979294-98 · Nov 6
£1,009 GBP
A$2,078 AUD
View
6 more retailers have this diamond
Prices start from £751 GBPSave up to £258 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
£751 GBP