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Cushion|Natural|GIA

1.51ct E SI1 Cushion Natural Diamond

EX • E/SI1 • GIA 6405967587

Certificate GIA 6405967587

Diamond specifications and retailer prices

From £3,899 GBP
As of November 6, 2026
Save £3,747 GBP (49%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: £7,647 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two carat band, graded E 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 6405967587. Listed at 25 retailers as of November 4, 2026, with prices from £3,899 to £7,647, a £3,747 spread on the same certified stone. MOH London lists it at £7,647. 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

1.51
Carat
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6405967587
Dimensions6.51 × 6.05 × 4.51 mm
L/W Ratio1.08
Top View
6.51 mm6.05 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6405967587
Side View
Table 60.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 74.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £7,647 GBP|Low: £4,105 GBP|High: £7,760 GBP|Avg: £5,297 GBP|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 8£4,105 GBP
Retailer 6£4,112 GBP
Retailer 9£4,151 GBP
Retailer 2£4,843 GBP
Retailer 4£4,942 GBP
Retailer 7£5,051 GBP
Retailer 3£5,654 GBP
Retailer 5£6,350 GBP
MOH London£7,647 GBP

34 data points across 9 retailers

25 retailers£3,899 GBP to £7,647 GBP

A
Cheapest Retailer
-
£3,899 GBP
A
Retailer 2
-
£4,066 GBP
View
Retailer 3
-
£4,105 GBP
View
Price last confirmed 9 days ago
A
Retailer 4
-
£4,112 GBP
View
A
Retailer 5
-
£4,151 GBP
View
Final sale: no returns
A
Retailer 6
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£4,167 GBP
View
A
Retailer 7
-
£4,356 GBP
View
A
Retailer 8
-
£4,386 GBP
View
A
Retailer 9
-
£4,428 GBP
View
Retailer 10
-
£4,715 GBP
View
Price last confirmed 8 days ago
B+
Retailer 11
-
£4,843 GBP
View
B+
Retailer 12
-
£4,905 GBP
View
B+
Retailer 13
-
£4,942 GBP
View
B+
Retailer 14
-
£4,973 GBP
View
Retailer 15
-
£5,051 GBP
View
Price last confirmed 15 days ago
B+
Retailer 16
-
£5,245 GBP
View
B+
Retailer 17
-
£5,245 GBP
View
B+
Retailer 18
-
£5,424 GBP
View
B+
Retailer 19
-
£5,654 GBP
View
Retailer 20
-
£5,736 GBP
View
Price last confirmed 14 days ago
B
Retailer 21
-
£5,898 GBP
View
B
Retailer 22
-
£5,962 GBP
View
B+
Retailer 23
-
£6,350 GBP
View
B
Retailer 24
-
£7,544 GBP
View
Most Expensive
B
MOH London
A7CF1D2F7 · Nov 4
£7,647 GBP
View
24 more retailers have this diamond
Prices start from £3,899 GBPSave up to £3,747 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
1.51ct Cushion
£3,899 GBP