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Cushion|Natural|GIA

0.40ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 1565394507

Certificate GIA 1565394507

Diamond specifications and retailer prices

From £209 GBP
₹26,685 INR
As of November 1, 2026
Save £467 GBP (69%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £676 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 1565394507. Listed at 12 retailers as of November 1, 2026, with prices from £209 to £676, a £467 spread on the same certified stone. MOH London lists it at £676. 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
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1565394507
Dimensions4.13 × 4.10 × 2.86 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Crystal
Top View
4.13 mm4.10 mm0.40 ctJ / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1565394507
Side View
Table 60.0%CrownGirdle: THK-VTKPavilionCulet: 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: £676 GBP|Low: £209 GBP|High: £683 GBP|Avg: £426 GBP|-0.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 3£209 GBP
Retailer 8£299 GBP
Retailer 9£315 GBP
Retailer 10£337 GBP
Retailer 2£382 GBP
Retailer 7£452 GBP
Retailer 6£453 GBP
Retailer 5£531 GBP
Retailer 4£592 GBP
MOH London£676 GBP

28 data points across 10 retailers

12 retailers£209 GBP to £676 GBP

A
Cheapest Retailer
-
£209 GBP
₹26,685 INR
B+
Retailer 2
-
£299 GBP
$400 USD
View
B+
Retailer 3
-
£315 GBP
$422 USD
View
B+
Retailer 4
-
£337 GBP
$452 USD
View
B+
Retailer 5
-
£382 GBP
View
B
Retailer 6
-
£399 GBP
$535 USD
View
B
Retailer 7
-
£452 GBP
$605 USD
View
B
Retailer 8
-
£453 GBP
ZAR 9,816 ZAR
View
Retailer 9
-
£468 GBP
A$966 AUD
View
Price last confirmed 29 days ago
B
Retailer 10
-
£531 GBP
€678 EUR
View
B
Retailer 11
-
£592 GBP
View
Most Expensive
B
MOH London
770D10AF9 · Nov 1
£676 GBP
View
11 more retailers have this diamond
Prices start from £209 GBPSave up to £467 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
£209 GBP