Cushion|Natural|GIA

1.51ct H SI1 Cushion Natural Diamond

EX • H/SI1 • GIA 2225656240

Certificate GIA 2225656240

Diamond specifications and retailer prices

From £5,241 GBP
$7,022 USD
As of November 2, 2026
Save £4,608 GBP (47%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £9,849 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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2225656240. Listed at 24 retailers as of November 1, 2026, with prices from £5,241 to £9,849, a £4,608 spread on the same certified stone. MOH London lists it at £9,849. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle35.57°
Pavilion angle40.44°
OriginNatural
Grading LabGIA
CertificateGIA 2225656240
Dimensions6.79 × 6.63 × 4.44 mm
L/W Ratio1.02
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
6.79 mm6.63 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2225656240
Side View
Table 68.0%Crown 35.57°Girdle: THK-VTKPavilion 40.44°Culet: NoneDepth 67.0%

Caratlytics Score

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

Price History

Last verified: Nov 2
Current: £9,849 GBP|Low: £5,150 GBP|High: £9,967 GBP|Avg: £6,758 GBP|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 3£5,241 GBP
Retailer 7£5,273 GBP
Retailer 9£5,533 GBP
Retailer 10£5,909 GBP
Retailer 11£5,910 GBP
Retailer 8£5,959 GBP
Retailer 4£6,596 GBP
Retailer 6£6,663 GBP
Retailer 2£7,720 GBP
Retailer 5£8,682 GBP
MOH London£9,849 GBP

44 data points across 11 retailers

24 retailers£5,241 GBP to £9,849 GBP

B+
Cheapest Retailer
-
£5,241 GBP
$7,022 USD
B+
Retailer 2
-
£5,273 GBP
$7,065 USD
View
B
Retailer 3
-
£5,496 GBP
$7,364 USD
View
B
Retailer 4
-
£5,517 GBP
A$11,372 AUD
View
B
Retailer 5
-
£5,533 GBP
$7,414 USD
View
B
Retailer 6
-
£5,688 GBP
$7,621 USD
View
B
Retailer 7
-
£5,885 GBP
$7,885 USD
View
B
Retailer 8
-
£5,909 GBP
$7,918 USD
View
Final sale: no returns
B
Retailer 9
-
£5,910 GBP
$7,919 USD
View
B
Retailer 10
-
£5,959 GBP
$7,984 USD
View
B
Retailer 11
-
£6,298 GBP
$8,438 USD
View
B
Retailer 12
-
£6,352 GBP
CA$11,820 CAD
View
B
Retailer 13
-
£6,490 GBP
A$13,378 AUD
View
B
Retailer 14
-
£6,505 GBP
$8,716 USD
View
B
Retailer 15
-
£6,596 GBP
View
Retailer 16
-
£6,663 GBP
A$13,736 AUD
View
Price last confirmed 9 days ago
B
Retailer 17
-
£6,918 GBP
$9,270 USD
View
B
Retailer 18
-
£6,918 GBP
$9,270 USD
View
B
Retailer 19
-
£7,069 GBP
$9,471 USD
View
B
Retailer 20
-
£7,150 GBP
$9,580 USD
View
B
Retailer 21
-
£7,720 GBP
€9,851 EUR
View
Retailer 22
-
£7,780 GBP
$10,425 USD
View
Price last confirmed 10 days ago
B
Retailer 23
-
£8,682 GBP
ZAR 187,930 ZAR
View
Most Expensive
B
MOH London
2FED25E2D · Nov 1
£9,849 GBP
View
23 more retailers have this diamond
Prices start from £5,241 GBPSave up to £4,608 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
£5,241 GBP