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Cushion|Natural|GIA

1.51ct H SI1 Cushion Natural Diamond

VG • H/SI1 • GIA 1428687763

Certificate GIA 1428687763

Diamond specifications and retailer prices

From £3,628 GBP
$4,868 USD
As of November 2, 2026
Save £4,190 GBP (54%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £7,817 GBP at MOH London · As of November 1, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 1428687763. Listed at 19 retailers as of November 1, 2026, with prices from £3,628 to £7,817, a £4,190 spread on the same certified stone. MOH London lists it at £7,817. 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
H
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1428687763
Dimensions6.69 × 5.94 × 4.13 mm
L/W Ratio1.13
Culet sizeNone
Top View
6.69 mm5.94 mm1.51 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1428687763
Side View
Table 61.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 69.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £7,817 GBP|Low: £3,909 GBP|High: £7,912 GBP|Avg: £5,486 GBP|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 3, 2026
Retailer 2£4,000 GBP
Retailer 6£4,393 GBP
Retailer 7£4,691 GBP
Retailer 8£4,691 GBP
Retailer 5£5,444 GBP
Retailer 3£6,127 GBP
Retailer 4£6,892 GBP
MOH London£7,817 GBP

44 data points across 8 retailers

19 retailers£3,628 GBP to £7,817 GBP

B+
Cheapest Retailer
-
£3,628 GBP
$4,868 USD
B+
Retailer 2
-
£4,000 GBP
View
B+
Retailer 3
-
£4,034 GBP
$5,413 USD
View
B+
Retailer 4
-
£4,300 GBP
$5,770 USD
View
B+
Retailer 5
-
£4,300 GBP
$5,770 USD
View
B+
Retailer 6
-
£4,393 GBP
$5,895 USD
View
B
Retailer 7
-
£4,432 GBP
$5,947 USD
View
B
Retailer 8
-
£4,441 GBP
$5,960 USD
View
B
Retailer 9
-
£4,691 GBP
$6,295 USD
View
Final sale: no returns
B
Retailer 10
-
£4,691 GBP
$6,295 USD
View
B
Retailer 11
-
£4,710 GBP
$6,320 USD
View
B+
Retailer 12
-
£4,773 GBP
$6,405 USD
View
B
Retailer 13
-
£4,999 GBP
$6,708 USD
View
B
Retailer 14
-
£5,379 GBP
$7,218 USD
View
Retailer 15
-
£5,444 GBP
A$11,240 AUD
View
Price last confirmed 12 days ago
B
Retailer 16
-
£6,127 GBP
€7,831 EUR
View
Retailer 17
-
£6,181 GBP
$8,294 USD
View
Price last confirmed 10 days ago
B
Retailer 18
-
£6,892 GBP
ZAR 149,411 ZAR
View
Most Expensive
B
MOH London
86C3866EA · Nov 1
£7,817 GBP
View
18 more retailers have this diamond
Prices start from £3,628 GBPSave up to £4,190 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.

B+
1.51ct Cushion
£3,628 GBP