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Cushion|Natural|GIA

1.51ct K SI1 Cushion Natural Diamond

VG • K/SI1 • GIA 2528970528

Certificate GIA 2528970528

Diamond specifications and retailer prices

From £1,700 GBP
As of November 5, 2026
Save £1,975 GBP (54%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £3,675 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2528970528. Listed at 12 retailers as of November 4, 2026, with prices from £1,700 to £3,675, a £1,975 spread on the same certified stone. MOH London lists it at £3,675. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
K
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle37°
Pavilion angle39.4°
OriginNatural
Grading LabGIA
CertificateGIA 2528970528
Dimensions6.59 × 6.55 × 4.45 mm
L/W Ratio1.01
Top View
6.59 mm6.55 mm1.51 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2528970528
Side View
Table 61.0%Crown 37°Girdle: MED-THKPavilion 39.4°Culet: NoneDepth 67.9%

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 5
Current: £3,675 GBP|Low: £1,700 GBP|High: £3,724 GBP|Avg: £2,310 GBP|+0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 4£1,700 GBP
Retailer 7£1,761 GBP
Retailer 12£1,883 GBP
Retailer 2£2,040 GBP
Retailer 9£2,062 GBP
Retailer 8£2,103 GBP
Retailer 3£2,208 GBP
Retailer 5£2,212 GBP
Retailer 10£2,281 GBP
Retailer 11£2,301 GBP
Retailer 6£2,566 GBP
MOH London£3,675 GBP

42 data points across 12 retailers

12 retailers£1,700 GBP to £3,675 GBP

A
Cheapest Retailer
-
£1,700 GBP
A
Retailer 2
-
£1,761 GBP
View
A
Retailer 3
-
£1,883 GBP
View
A
Retailer 4
-
£2,040 GBP
View
B+
Retailer 5
-
£2,062 GBP
View
Retailer 6
-
£2,103 GBP
View
Price last confirmed 13 days ago
B+
Retailer 7
-
£2,208 GBP
View
A
Retailer 8
-
£2,212 GBP
View
B+
Retailer 9
-
£2,281 GBP
View
B+
Retailer 10
-
£2,301 GBP
View
B+
Retailer 11
-
£2,566 GBP
View
Most Expensive
B
MOH London
34FD10842 · Nov 4
£3,675 GBP
View
11 more retailers have this diamond
Prices start from £1,700 GBPSave up to £1,975 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
£1,700 GBP