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Cushion|Natural|GIA

1.51ct G SI1 Cushion Natural Diamond

EX • G/SI1 • GIA 1425256232

Certificate GIA 1425256232

Diamond specifications and retailer prices

From £3,450 GBP
$4,630 USD
As of November 2, 2026
Save £3,296 GBP (49%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £6,746 GBP at MOH London · As of November 1, 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 G 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 1425256232. Listed at 20 retailers as of November 1, 2026, with prices from £3,450 to £6,746, a £3,296 spread on the same certified stone. MOH London lists it at £6,746. 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1425256232
Dimensions6.16 × 6.04 × 4.61 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Needle, Indented Natural
Top View
6.16 mm6.04 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1425256232
Side View
Table 59.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 76.4%

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 2
Current: £6,746 GBP|Low: £3,318 GBP|High: £6,827 GBP|Avg: £4,711 GBP|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 10£3,450 GBP
Retailer 6£3,648 GBP
Retailer 8£3,649 GBP
Retailer 11£3,882 GBP
Retailer 7£4,148 GBP
Retailer 4£4,393 GBP
Retailer 9£4,550 GBP
Retailer 2£5,002 GBP
Retailer 5£5,626 GBP
Retailer 3£6,634 GBP
MOH London£6,746 GBP

45 data points across 11 retailers

20 retailers£3,450 GBP to £6,746 GBP

A
Cheapest Retailer
-
£3,450 GBP
$4,630 USD
A
Retailer 2
-
£3,577 GBP
$4,800 USD
View
A
Retailer 3
-
£3,618 GBP
$4,855 USD
View
A
Retailer 4
-
£3,648 GBP
$4,895 USD
View
A
Retailer 5
-
£3,649 GBP
$4,897 USD
View
Final sale: no returns
A
Retailer 6
-
£3,664 GBP
$4,917 USD
View
A
Retailer 7
-
£3,860 GBP
CA$7,195 CAD
View
A
Retailer 8
-
£3,882 GBP
$5,210 USD
View
B+
Retailer 9
-
£3,896 GBP
$5,228 USD
View
B+
Retailer 10
-
£4,099 GBP
$5,500 USD
View
B+
Retailer 11
-
£4,148 GBP
$5,567 USD
View
B+
Retailer 12
-
£4,373 GBP
$5,868 USD
View
B+
Retailer 13
-
£4,393 GBP
View
Retailer 14
-
£4,550 GBP
A$9,394 AUD
View
Price last confirmed 29 days ago
B+
Retailer 15
-
£5,002 GBP
€6,393 EUR
View
Retailer 16
-
£5,049 GBP
$6,776 USD
View
Price last confirmed 10 days ago
B
Retailer 17
-
£5,187 GBP
$6,960 USD
View
B+
Retailer 18
-
£5,626 GBP
ZAR 121,964 ZAR
View
B
Retailer 19
-
£6,634 GBP
$8,903 USD
View
Most Expensive
B
MOH London
C97E3DB6C · Nov 1
£6,746 GBP
View
19 more retailers have this diamond
Prices start from £3,450 GBPSave up to £3,296 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
£3,450 GBP