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Cushion|Natural|GIA

1.51ct K SI1 Cushion Natural Diamond

VG • K/SI1 • GIA 5556305352

Certificate GIA 5556305352

Diamond specifications and retailer prices

From £1,759 GBP
As of November 6, 2026
Save £2,029 GBP (54%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £3,789 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 5556305352. Listed at 17 retailers as of November 4, 2026, with prices from £1,759 to £3,789, a £2,029 spread on the same certified stone. MOH London lists it at £3,789. 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
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5556305352
Dimensions7.51 × 5.76 × 4.19 mm
L/W Ratio1.30
Girdle conditionFaceted
Top View
7.51 mm5.76 mm1.51 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5556305352
Side View
Table 68.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 72.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £3,789 GBP|Low: £1,730 GBP|High: £3,959 GBP|Avg: £2,414 GBP|-4.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 6, 2026
Retailer 4£1,759 GBP
Retailer 6£1,762 GBP
Retailer 12£1,878 GBP
Retailer 13£1,900 GBP
Retailer 14£1,909 GBP
Retailer 16£2,021 GBP
Retailer 8£2,051 GBP
Retailer 5£2,159 GBP
Retailer 2£2,204 GBP
Retailer 3£2,211 GBP
Retailer 7£2,329 GBP
Retailer 10£2,391 GBP
Retailer 9£2,644 GBP
Retailer 11£2,773 GBP
Retailer 15£3,629 GBP
MOH London£3,789 GBP

24 data points across 16 retailers

17 retailers£1,759 GBP to £3,789 GBP

A
Cheapest Retailer
-
£1,759 GBP
A
Retailer 2
-
£1,762 GBP
View
A
Retailer 3
-
£1,878 GBP
View
A
Retailer 4
-
£1,900 GBP
View
Final sale: no returns
A
Retailer 5
-
£1,909 GBP
View
A
Retailer 6
-
£2,021 GBP
View
B+
Retailer 7
-
£2,051 GBP
View
A
Retailer 8
-
£2,159 GBP
View
A
Retailer 9
-
£2,204 GBP
View
A
Retailer 10
-
£2,211 GBP
View
Retailer 11
-
£2,329 GBP
View
Price last confirmed 18 days ago
B+
Retailer 12
-
£2,391 GBP
View
B+
Retailer 13
-
£2,456 GBP
View
B+
Retailer 14
-
£2,644 GBP
View
B+
Retailer 15
-
£2,773 GBP
View
B
Retailer 16
-
£3,629 GBP
View
Most Expensive
B
MOH London
83913B52F · Nov 4
£3,789 GBP
View
16 more retailers have this diamond
Prices start from £1,759 GBPSave up to £2,029 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
£1,759 GBP