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Cushion|Natural|GIA

1.51ct D SI2 Cushion Natural Diamond

GD • D/SI2 • GIA 1425646526

Certificate GIA 1425646526

Diamond specifications and retailer prices

From £2,636 GBP
$3,532 USD
As of October 31, 2026
Save £1,163 GBP (31%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,799 GBP at 77 Diamonds · As of October 30, 2026
View at 77 Diamonds

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 1425646526. Listed at 11 retailers as of October 30, 2026, with prices from £2,636 to £3,799, a £1,163 spread on the same certified stone. 77 Diamonds lists it at £3,799. 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
D
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1425646526
Dimensions6.95 × 6.28 × 4.26 mm
L/W Ratio1.11
Culet sizeNone
Key to symbols
Crystal, Feather
Top View
6.95 mm6.28 mm1.51 ctD / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1425646526
Side View
Table 59.0%CrownGirdle: STK-THKPavilionCulet: 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: Oct 31
Current: £3,799 GBP|Low: £2,602 GBP|High: £3,813 GBP|Avg: £3,343 GBP|+2.0%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 31, 2026
Retailer 5£2,636 GBP
Retailer 3£2,687 GBP
Retailer 4£3,311 GBP
Retailer 7£3,515 GBP
Retailer 8£3,515 GBP
Retailer 6£3,635 GBP
Retailer 2£3,662 GBP
77 Diamonds£3,799 GBP

40 data points across 8 retailers

11 retailers£2,636 GBP to £3,799 GBP

A
Cheapest Retailer
-
£2,636 GBP
$3,532 USD
A
Retailer 2
-
£2,691 GBP
$3,606 USD
View
A
Retailer 3
-
£2,720 GBP
$3,644 USD
View
A
Retailer 4
-
£2,752 GBP
$3,688 USD
View
A
Retailer 5
-
£2,853 GBP
A$5,882 AUD
View
B+
Retailer 6
-
£3,311 GBP
$4,437 USD
View
B+
Retailer 7
-
£3,515 GBP
$4,710 USD
View
B+
Retailer 8
-
£3,515 GBP
$4,710 USD
View
B+
Retailer 9
-
£3,635 GBP
$4,870 USD
View
B+
Retailer 10
-
£3,662 GBP
€4,673 EUR
View
Most Expensive
B+
77 Diamonds
CUSMB7JFGWDUP · Oct 30
£3,799 GBP
View
10 more retailers have this diamond
Prices start from £2,636 GBPSave up to £1,163 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
£2,636 GBP