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Cushion|Natural|GIA

1.51ct G SI1 Cushion Natural Diamond

EX • G/SI1 • GIA 2557386199

Certificate GIA 2557386199

Diamond specifications and retailer prices

From £2,495 GBP
As of November 6, 2026
Save £2,857 GBP (53%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £5,352 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 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 2557386199. Listed at 10 retailers as of November 4, 2026, with prices from £2,495 to £5,352, a £2,857 spread on the same certified stone. MOH London lists it at £5,352. 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
SymmetryExcellent
FluorescenceNone
Pavilion angle36.68°
OriginNatural
Grading LabGIA
CertificateGIA 2557386199
Dimensions7.59 × 5.90 × 4.09 mm
L/W Ratio1.29
Key to symbols
Crystal, Needle
Top View
7.59 mm5.90 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557386199
Side View
Table 66.0%CrownGirdle: THK-VTKPavilion 36.68°Culet: NoneDepth 69.3%

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: £5,352 GBP|Low: £2,486 GBP|High: £6,082 GBP|Avg: £3,668 GBP|-11.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 6£2,495 GBP
Retailer 5£2,914 GBP
Retailer 7£2,994 GBP
Retailer 4£3,088 GBP
Retailer 2£3,103 GBP
Retailer 8£3,589 GBP
Retailer 3£3,851 GBP
Retailer 9£3,856 GBP
MOH London£5,352 GBP

33 data points across 9 retailers

10 retailers£2,495 GBP to £5,352 GBP

A
Cheapest Retailer
-
£2,495 GBP
A
Retailer 2
-
£2,914 GBP
View
A
Retailer 3
-
£2,994 GBP
View
A
Retailer 4
-
£3,088 GBP
View
A
Retailer 5
-
£3,103 GBP
View
A
Retailer 6
-
£3,589 GBP
View
A
Retailer 7
-
£3,851 GBP
View
A
Retailer 8
-
£3,856 GBP
View
Final sale: no returns
B+
Retailer 9
-
£3,883 GBP
View
Most Expensive
B+
MOH London
A5213C48E · Nov 4
£5,352 GBP
View
9 more retailers have this diamond
Prices start from £2,495 GBPSave up to £2,857 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
£2,495 GBP