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Cushion|Natural|GIA

1.51ct I SI2 Cushion Natural Diamond

EX • I/SI2 • GIA 6551796873

Certificate GIA 6551796873

Diamond specifications and retailer prices

From £1,969 GBP
As of November 6, 2026
Save £2,561 GBP (57%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £4,531 GBP at MOH London · As of November 2, 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 6551796873. Listed at 8 retailers as of November 2, 2026, with prices from £1,969 to £4,531, a £2,561 spread on the same certified stone. MOH London lists it at £4,531. 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
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle35.97°
OriginNatural
Grading LabGIA
CertificateGIA 6551796873
Dimensions7.56 × 5.87 × 4.09 mm
L/W Ratio1.29
Key to symbols
Crystal, Cloud, Feather, Knot, Needle
Top View
7.56 mm5.87 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551796873
Side View
Table 64.0%CrownGirdle: MED-VTKPavilion 35.97°Culet: NoneDepth 69.7%

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: £4,531 GBP|Low: £1,969 GBP|High: £5,005 GBP|Avg: £3,035 GBP|-9.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 2£1,969 GBP
Retailer 7£2,450 GBP
Retailer 3£2,588 GBP
Retailer 5£2,741 GBP
Retailer 6£2,872 GBP
Retailer 4£3,172 GBP
MOH London£4,531 GBP

43 data points across 7 retailers

8 retailers£1,969 GBP to £4,531 GBP

A
Cheapest Retailer
-
£1,969 GBP
A
Retailer 2
-
£2,450 GBP
View
A
Retailer 3
-
£2,588 GBP
View
A
Retailer 4
-
£2,741 GBP
View
A
Retailer 5
-
£2,872 GBP
View
A
Retailer 6
-
£2,985 GBP
View
A
Retailer 7
-
£3,172 GBP
View
Most Expensive
B
MOH London
FA73139D7 · Nov 2
£4,531 GBP
View
7 more retailers have this diamond
Prices start from £1,969 GBPSave up to £2,561 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
£1,969 GBP