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Cushion|Natural|GIA

1.00ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 1437577148

Certificate GIA 1437577148

Diamond specifications and retailer prices

From £1,244 GBP
As of November 5, 2026
Save £1,483 GBP (54%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £2,727 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 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 1437577148. Listed at 19 retailers as of November 4, 2026, with prices from £1,244 to £2,727, a £1,483 spread on the same certified stone. MOH London lists it at £2,727. 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 1437577148
Dimensions6.29 × 5.26 × 3.55 mm
L/W Ratio1.20
Culet sizeNone
Key to symbols
Feather, Crystal, Knot, Cavity, Indented Natural, Needle, Natural
Top View
6.29 mm5.26 mm1.00 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1437577148
Side View
Table 63.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 67.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £2,727 GBP|Low: £1,208 GBP|High: £2,749 GBP|Avg: £1,705 GBP|-0.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 5£1,248 GBP
Retailer 7£1,305 GBP
Retailer 9£1,319 GBP
Retailer 6£1,414 GBP
Retailer 2£1,514 GBP
Retailer 4£1,904 GBP
Retailer 8£1,924 GBP
Retailer 3£2,120 GBP
MOH London£2,727 GBP

38 data points across 9 retailers

19 retailers£1,244 GBP to £2,727 GBP

B+
Cheapest Retailer
-
£1,244 GBP
B+
Retailer 2
-
£1,248 GBP
View
B+
Retailer 3
-
£1,289 GBP
View
B+
Retailer 4
-
£1,305 GBP
View
Final sale: no returns
Retailer 5
-
£1,319 GBP
View
Price last confirmed 10 days ago
B+
Retailer 6
-
£1,322 GBP
View
B+
Retailer 7
-
£1,322 GBP
View
B+
Retailer 8
-
£1,364 GBP
View
B+
Retailer 9
-
£1,367 GBP
View
Retailer 10
-
£1,414 GBP
View
Price last confirmed 9 days ago
B
Retailer 11
-
£1,449 GBP
View
B
Retailer 12
-
£1,462 GBP
View
B+
Retailer 13
-
£1,514 GBP
View
B
Retailer 14
-
£1,668 GBP
View
B
Retailer 15
-
£1,710 GBP
View
B
Retailer 16
-
£1,904 GBP
View
Retailer 17
-
£1,924 GBP
View
Price last confirmed 33 days ago
B
Retailer 18
-
£2,120 GBP
View
Most Expensive
B
MOH London
C3CD0076E · Nov 4
£2,727 GBP
View
18 more retailers have this diamond
Prices start from £1,244 GBPSave up to £1,483 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.

B+
1.00ct Cushion
£1,244 GBP