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Cushion|Natural|GIA

1.51ct K SI2 Cushion Natural Diamond

GD • K/SI2 • GIA 6562373069

Certificate GIA 6562373069

Diamond specifications and retailer prices

From £1,798 GBP
As of November 6, 2026
Save £757 GBP (30%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £2,554 GBP at Blue Nile · As of October 31, 2026
View at Blue Nile

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 SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6562373069. Listed at 6 retailers as of October 31, 2026, with prices from £1,798 to £2,554, a £757 spread on the same certified stone. Blue Nile lists it at £2,554. 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
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6562373069
Dimensions7.77 × 5.89 × 3.98 mm
L/W Ratio1.32
Top View
7.77 mm5.89 mm1.51 ctK / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6562373069
Side View
Table 61.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 67.5%

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: £2,554 GBP|Low: £1,778 GBP|High: £2,773 GBP|Avg: £2,207 GBP|-1.7%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 3£1,798 GBP
Retailer 2£1,816 GBP
Retailer 6£2,073 GBP
Retailer 5£2,253 GBP
Retailer 4£2,496 GBP
Blue Nile£2,554 GBP

42 data points across 6 retailers

6 retailers£1,798 GBP to £2,554 GBP

A
Cheapest Retailer
-
£1,798 GBP
A
Retailer 2
-
£1,816 GBP
View
Retailer 3
-
£2,073 GBP
View
Price last confirmed 9 days ago
B+
Retailer 4
-
£2,253 GBP
View
Retailer 5
-
£2,496 GBP
View
Price last confirmed 10 days ago
Most Expensive
B+
Blue Nile
30380905 · Oct 31
£2,554 GBP
$3,419 USD
View
5 more retailers have this diamond
Prices start from £1,798 GBPSave up to £757 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
£1,798 GBP