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Cushion|Natural|GIA

1.00ct I SI2 Cushion Natural Diamond

GD • I/SI2 • GIA 1559983627

Certificate GIA 1559983627

Diamond specifications and retailer prices

From £668 GBP
As of November 2, 2026
Save £964 GBP (59%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,632 GBP at MOH London · As of November 2, 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 standard cut grade stated by the retailer rather than the lab and certified by GIA 1559983627. Listed at 14 retailers as of November 2, 2026, with prices from £668 to £1,632, a £964 spread on the same certified stone. MOH London lists it at £1,632. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.00
Carat
I
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 1559983627
Dimensions6.58 × 5.08 × 3.55 mm
L/W Ratio1.30
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
6.58 mm5.08 mm1.00 ctI / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 1559983627
Side View
Table 59.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 69.9%

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 2
Current: £1,632 GBP|Low: £668 GBP|High: £1,649 GBP|Avg: £968 GBP|-1.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 4, 2026
Retailer 8£668 GBP
Retailer 10£755 GBP
Retailer 4£822 GBP
Retailer 9£859 GBP
Retailer 11£866 GBP
Retailer 5£879 GBP
Retailer 3£920 GBP
Retailer 7£968 GBP
Retailer 12£974 GBP
Retailer 2£1,006 GBP
Retailer 6£1,241 GBP
MOH London£1,632 GBP

23 data points across 12 retailers

14 retailers£668 GBP to £1,632 GBP

A
Cheapest Retailer
-
£668 GBP
B+
Retailer 2
-
£755 GBP
View
B+
Retailer 3
-
£822 GBP
View
Final sale: no returns
B+
Retailer 4
-
£859 GBP
View
B+
Retailer 5
-
£866 GBP
View
B+
Retailer 6
-
£879 GBP
View
Retailer 7
-
£891 GBP
View
Price last confirmed 29 days ago
B+
Retailer 8
-
£920 GBP
View
B+
Retailer 9
-
£968 GBP
View
B+
Retailer 10
-
£974 GBP
View
B+
Retailer 11
-
£985 GBP
View
B+
Retailer 12
-
£1,006 GBP
View
B+
Retailer 13
-
£1,241 GBP
View
Most Expensive
B
MOH London
49A69BAE9 · Nov 2
£1,632 GBP
View
13 more retailers have this diamond
Prices start from £668 GBPSave up to £964 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
£668 GBP