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Cushion|Natural|GIA

0.40ct G SI1 Cushion Natural Diamond

VG • G/SI1 • GIA 2557639663

Certificate GIA 2557639663

Diamond specifications and retailer prices

From £384 GBP
$515 USD
As of November 1, 2026
Save £477 GBP (55%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £862 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 0.4ct natural cushion diamond

This 0.4ct natural cushion sits in the sub-half-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2557639663. Listed at 14 retailers as of November 1, 2026, with prices from £384 to £862, a £477 spread on the same certified stone. MOH London lists it at £862. 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

0.40
Carat
G
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2557639663
Dimensions4.90 × 3.77 × 2.63 mm
L/W Ratio1.30
Culet sizeNone
Key to symbols
Twinning Wisp, Cloud
Top View
4.90 mm3.77 mm0.40 ctG / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2557639663
Side View
Table 62.0%CrownGirdle: VTK-ETKPavilionCulet: NoneDepth 69.7%

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 1
Current: £862 GBP|Low: £330 GBP|High: £871 GBP|Avg: £520 GBP|+20.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 1, 2026
Retailer 12£384 GBP
Retailer 11£411 GBP
Retailer 4£440 GBP
Retailer 8£440 GBP
Retailer 6£469 GBP
Retailer 3£480 GBP
Retailer 5£490 GBP
Retailer 13£509 GBP
Retailer 10£523 GBP
Retailer 7£571 GBP
Retailer 9£592 GBP
Retailer 2£755 GBP
MOH London£862 GBP

35 data points across 13 retailers

14 retailers£384 GBP to £862 GBP

Retailer 1
-
£321 GBP
SGD 581 SGD
Price last confirmed 24 days ago
A
Retailer 2
-
£384 GBP
$515 USD
View
B+
Retailer 3
-
£411 GBP
$551 USD
View
B+
Retailer 4
-
£440 GBP
$590 USD
View
B+
Retailer 5
-
£440 GBP
$590 USD
View
B+
Retailer 6
-
£469 GBP
View
B+
Retailer 7
-
£480 GBP
$643 USD
View
Retailer 8
-
£490 GBP
A$1,010 AUD
View
Price last confirmed 29 days ago
B
Retailer 9
-
£509 GBP
$682 USD
View
B
Retailer 10
-
£523 GBP
View
B
Retailer 11
-
£571 GBP
€729 EUR
View
B
Retailer 12
-
£592 GBP
ZAR 12,815 ZAR
View
C
Retailer 13
-
£755 GBP
View
Most Expensive
C
MOH London
97C107CE1 · Nov 1
£862 GBP
View
13 more retailers have this diamond
Prices start from £384 GBPSave up to £477 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
0.40ct Cushion
£384 GBP