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Cushion|Natural|GIA

1.40ct E SI2 Cushion Natural Diamond

ID • E/SI2 • GIA 6545517059

Certificate GIA 6545517059

Diamond specifications and retailer prices

From £2,211 GBP
HK$23,000 HKD
As of October 29, 2026
Save £963 GBP (30%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £3,174 GBP at Blue Nile · As of October 29, 2026
View at Blue Nile

About this 1.4ct natural cushion diamond

This 1.4ct natural cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6545517059. Listed at 5 retailers as of October 29, 2026, with prices from £2,211 to £3,174, a £963 spread on the same certified stone. Blue Nile lists it at £3,174. 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

1.40
Carat
E
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6545517059
Dimensions6.39 × 6.16 × 4.23 mm
L/W Ratio1.04
Top View
6.39 mm6.16 mm1.40 ctE / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6545517059
Side View
Table 65.0%CrownGirdle: Very ThickPavilionCulet: 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: Oct 29
Current: £3,174 GBP|Low: £2,211 GBP|High: £3,344 GBP|Avg: £2,912 GBP|-2.7%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 22, 2026
Retailer 2£2,211 GBP
Retailer 4£2,640 GBP
Retailer 5£2,664 GBP
Retailer 3£3,064 GBP
Blue Nile£3,174 GBP
Retailer 6£3,344 GBP

11 data points across 6 retailers

5 retailers£2,211 GBP to £3,174 GBP

A
Cheapest Retailer
-
£2,211 GBP
HK$23,000 HKD
A
Retailer 2
-
£2,640 GBP
SGD 4,751 SGD
View
A
Retailer 3
-
£2,664 GBP
$3,547 USD
View
A
Retailer 4
-
£3,064 GBP
$4,080 USD
View
Most Expensive
A
Blue Nile
28416902 · Oct 29
£3,174 GBP
$4,227 USD
View
4 more retailers have this diamond
Prices start from £2,211 GBPSave up to £963 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
1.40ct Cushion
£2,211 GBP