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Cushion|Natural|GIA

0.40ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 2557428722

Certificate GIA 2557428722

Diamond specifications and retailer prices

From £175 GBP
₹22,316 INR
As of November 1, 2026
Save £381 GBP (69%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £555 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 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 2557428722. Listed at 16 retailers as of November 1, 2026, with prices from £175 to £555, a £381 spread on the same certified stone. MOH London lists it at £555. 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

0.40
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2557428722
Dimensions5.32 × 3.59 × 2.46 mm
L/W Ratio1.48
Top View
5.32 mm3.59 mm0.40 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2557428722
Side View
Table 68.0%CrownGirdle: MED-ETKPavilionCulet: NoneDepth 68.7%

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: £555 GBP|Low: £175 GBP|High: £597 GBP|Avg: £343 GBP|-7.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 2, 2026
Retailer 9£175 GBP
Retailer 6£210 GBP
Retailer 12£224 GBP
Retailer 5£259 GBP
Retailer 4£261 GBP
Retailer 13£299 GBP
Retailer 14£306 GBP
Retailer 8£310 GBP
Retailer 7£319 GBP
Retailer 15£328 GBP
Retailer 3£338 GBP
Retailer 11£373 GBP
Retailer 10£451 GBP
Retailer 2£487 GBP
MOH London£555 GBP

24 data points across 15 retailers

16 retailers£175 GBP to £555 GBP

A
Cheapest Retailer
-
£175 GBP
₹22,316 INR
A
Retailer 2
-
£210 GBP
HK$2,200 HKD
View
A
Retailer 3
-
£224 GBP
$300 USD
View
A
Retailer 4
-
£259 GBP
$347 USD
View
A
Retailer 5
-
£261 GBP
SGD 472 SGD
View
A
Retailer 6
-
£299 GBP
$400 USD
View
A
Retailer 7
-
£306 GBP
$410 USD
View
A
Retailer 8
-
£310 GBP
View
Retailer 9
-
£319 GBP
$427 USD
View
Price last confirmed 8 days ago
B+
Retailer 10
-
£328 GBP
$440 USD
View
B+
Retailer 11
-
£338 GBP
$453 USD
View
B+
Retailer 12
-
£373 GBP
ZAR 8,071 ZAR
View
Retailer 13
-
£410 GBP
A$845 AUD
View
Price last confirmed 29 days ago
B+
Retailer 14
-
£451 GBP
€575 EUR
View
B
Retailer 15
-
£487 GBP
View
Most Expensive
B
MOH London
DBDC5FBD7 · Nov 1
£555 GBP
View
15 more retailers have this diamond
Prices start from £175 GBPSave up to £381 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
£175 GBP