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Cushion|Natural|GIA

1.00ct J SI2 Cushion Natural Diamond

EX • J/SI2 • GIA 1508655786

Certificate GIA 1508655786

Diamond specifications and retailer prices

From £853 GBP
As of November 6, 2026
Save £342 GBP (29%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,703 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1ct natural cushion diamond

This 1ct natural cushion 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 1508655786. Listed at 11 retailers as of November 6, 2026, with a 40% 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 (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1508655786
Dimensions5.53 × 5.38 × 4.03 mm
L/W Ratio1.03
Culet sizeNone
Key to symbols
Crystal, Feather, Cloud, Needle
Top View
5.53 mm5.38 mm1.00 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1508655786
Side View
Table 59.0%CrownGirdle: STK-ETKPavilionCulet: NoneDepth 75.0%

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: £1,703 GBP|Low: £782 GBP|High: £1,940 GBP|Avg: £1,116 GBP|-12.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 6£853 GBP
Retailer 7£886 GBP
Retailer 2£921 GBP
Retailer 5£925 GBP
Retailer 10£937 GBP
Retailer 8£1,025 GBP
Retailer 4£1,045 GBP
Retailer 9£1,127 GBP
Retailer 3£1,195 GBP
MOH London£1,703 GBP

42 data points across 10 retailers

11 retailers£853 GBP to £1,195 GBP

A
Cheapest Retailer
-
£853 GBP
Final sale: no returns
A
Retailer 2
-
£886 GBP
View
A
Retailer 3
-
£921 GBP
View
Retailer 4
-
£925 GBP
View
Price last confirmed 8 days ago
B+
Retailer 5
-
£937 GBP
View
B+
Retailer 6
-
£1,025 GBP
View
B+
Retailer 7
-
£1,045 GBP
View
B+
Retailer 8
-
£1,127 GBP
View
B+
Retailer 9
-
£1,150 GBP
View
B+
Retailer 10
-
£1,195 GBP
View
Most Expensive
MOH London
C03E2AA9D · Oct 29
£1,703 GBP
View
Price last confirmed 8 days ago
10 more retailers have this diamond
Prices start from £853 GBPSave up to £342 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
£853 GBP