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Cushion|Natural|GIA

1.51ct I SI1 Cushion Natural Diamond

ID • I/SI1 • GIA 1232947260

Certificate GIA 1232947260

Diamond specifications and retailer prices

From £2,493 GBP
HK$26,100 HKD
As of November 1, 2026
Save £2,914 GBP (54%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £5,407 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 I 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 1232947260. Listed at 9 retailers as of November 1, 2026, with prices from £2,493 to £5,407, a £2,914 spread on the same certified stone. MOH London lists it at £5,407. 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
I
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle35.31°
OriginNatural
Grading LabGIA
CertificateGIA 1232947260
Dimensions7.81 × 5.96 × 4.04 mm
L/W Ratio1.31
Key to symbols
Feather, Needle, Pinpoint, Cloud
Top View
7.81 mm5.96 mm1.51 ctI / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1232947260
Side View
Table 59.0%CrownGirdle: MED-THKPavilion 35.31°Culet: NoneDepth 67.8%

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: £5,407 GBP|Low: £2,493 GBP|High: £5,938 GBP|Avg: £3,642 GBP|-8.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 5£2,493 GBP
Retailer 6£3,036 GBP
Retailer 2£3,221 GBP
Retailer 8£3,257 GBP
Retailer 4£3,526 GBP
Retailer 7£3,664 GBP
Retailer 3£3,889 GBP
MOH London£5,407 GBP

33 data points across 8 retailers

9 retailers£2,493 GBP to £5,407 GBP

A
Cheapest Retailer
-
£2,493 GBP
HK$26,100 HKD
A
Retailer 2
-
£3,036 GBP
$4,068 USD
View
A
Retailer 3
-
£3,221 GBP
View
A
Retailer 4
-
£3,257 GBP
SGD 5,898 SGD
View
B+
Retailer 5
-
£3,526 GBP
€4,499 EUR
View
B+
Retailer 6
-
£3,664 GBP
$4,909 USD
View
B+
Retailer 7
-
£3,710 GBP
A$7,648 AUD
View
B+
Retailer 8
-
£3,889 GBP
€4,963 EUR
View
Most Expensive
B
MOH London
8D2B6642B · Nov 1
£5,407 GBP
View
8 more retailers have this diamond
Prices start from £2,493 GBPSave up to £2,914 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
£2,493 GBP