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Cushion|Natural|GIA

0.42ct F SI1 Cushion Natural Diamond

EX • F/SI1 • GIA 1528116085

Certificate GIA 1528116085

Diamond specifications and retailer prices

From £586 GBP
As of November 3, 2026
Save £513 GBP (47%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £1,099 GBP at MOH London · As of November 2, 2026
View at MOH London

About this 0.42ct natural cushion diamond

This 0.42ct natural cushion sits in the sub-half-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1528116085. Listed at 5 retailers as of November 2, 2026, with prices from £586 to £1,099, a £513 spread on the same certified stone. MOH London lists it at £1,099. 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

0.42
Carat
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1528116085
Dimensions4.35 × 4.30 × 2.98 mm
L/W Ratio1.01
Top View
4.35 mm4.30 mm0.42 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryGood
FluorescenceNone
CertificateGIA 1528116085
Side View
Table 63.0%CrownGirdlePavilionCulet: NoneDepth 69.4%

Caratlytics Score

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

Price History

Last verified: Nov 3
Current: £1,099 GBP|Low: £550 GBP|High: £1,112 GBP|Avg: £738 GBP|-0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 3, 2026
Retailer 2£586 GBP
Retailer 4£596 GBP
Retailer 3£700 GBP
Retailer 5£715 GBP
MOH London£1,099 GBP

45 data points across 5 retailers

5 retailers£586 GBP to £1,099 GBP

B+
Cheapest Retailer
-
£586 GBP
B+
Retailer 2
-
£596 GBP
View
B
Retailer 3
-
£700 GBP
€895 EUR
View
Retailer 4
-
£715 GBP
A$1,477 AUD
View
Price last confirmed 30 days ago
Most Expensive
B
MOH London
04F43B370 · Nov 2
£1,099 GBP
View
4 more retailers have this diamond
Prices start from £586 GBPSave up to £513 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+
0.42ct Cushion
£586 GBP