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Cushion|Natural|GIA

1.51ct I SI2 Cushion Natural Diamond

ID • I/SI2 • GIA 7551678990

Certificate GIA 7551678990

Diamond specifications and retailer prices

From £2,252 GBP
As of November 6, 2026
Save £2,366 GBP (51%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £4,618 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7551678990. Listed at 11 retailers as of November 4, 2026, with prices from £2,252 to £4,618, a £2,366 spread on the same certified stone. MOH London lists it at £4,618. 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
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.63°
Pavilion angle36.04°
OriginNatural
Grading LabGIA
CertificateGIA 7551678990
Dimensions5.96 × 7.47 × 4.11 mm
L/W Ratio1.25
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Needle
Top View
5.96 mm7.47 mm1.51 ctI / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7551678990
Side View
Table 65.0%Crown 37.63°Girdle: Very ThickPavilion 36.04°Culet: NoneDepth 69.0%

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 6
Current: £4,618 GBP|Low: £2,062 GBP|High: £4,830 GBP|Avg: £3,055 GBP|-4.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 5£2,252 GBP
Retailer 6£2,306 GBP
Retailer 4£2,397 GBP
Retailer 2£2,492 GBP
Retailer 11£2,616 GBP
Retailer 7£2,619 GBP
Retailer 9£2,778 GBP
Retailer 8£2,808 GBP
Retailer 3£2,854 GBP
Retailer 10£2,907 GBP
MOH London£4,618 GBP

42 data points across 11 retailers

11 retailers£2,252 GBP to £4,618 GBP

A
Cheapest Retailer
-
£2,252 GBP
A
Retailer 2
-
£2,306 GBP
View
A
Retailer 3
-
£2,397 GBP
View
A
Retailer 4
-
£2,492 GBP
View
Final sale: no returns
A
Retailer 5
-
£2,616 GBP
View
A
Retailer 6
-
£2,619 GBP
View
A
Retailer 7
-
£2,699 GBP
View
A
Retailer 8
-
£2,778 GBP
View
A
Retailer 9
-
£2,808 GBP
View
A
Retailer 10
-
£2,907 GBP
View
Most Expensive
B
MOH London
ADAA463D8 · Nov 4
£4,618 GBP
View
10 more retailers have this diamond
Prices start from £2,252 GBPSave up to £2,366 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
£2,252 GBP