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Cushion|Natural|GIA

1.51ct H SI1 Cushion Natural Diamond

VG • H/SI1 • GIA 1257122355

Certificate GIA 1257122355

Diamond specifications and retailer prices

From £5,459 GBP
$7,325 USD
As of November 2, 2026
Save £4,805 GBP (47%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £10,264 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 1257122355. Listed at 20 retailers as of November 1, 2026, with prices from £5,459 to £10,264, a £4,805 spread on the same certified stone. MOH London lists it at £10,264. 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
PolishVery Good
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1257122355
Dimensions6.67 × 6.35 × 4.29 mm
L/W Ratio1.05
Top View
6.67 mm6.35 mm1.51 ctH / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateGIA 1257122355
Side View
Table 65.0%CrownGirdle: MED-EXTPavilionCulet: NoneDepth 67.5%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £10,264 GBP|Low: £5,459 GBP|High: £10,388 GBP|Avg: £7,024 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£5,459 GBP
Retailer 7£5,492 GBP
Retailer 8£5,767 GBP
Retailer 11£6,159 GBP
Retailer 9£6,267 GBP
Retailer 6£6,806 GBP
Retailer 10£6,871 GBP
Retailer 4£6,880 GBP
Retailer 2£7,647 GBP
Retailer 5£9,048 GBP
MOH London£10,264 GBP

44 data points across 11 retailers

20 retailers£5,459 GBP to £10,264 GBP

B
Cheapest Retailer
-
£5,459 GBP
$7,325 USD
B
Retailer 2
-
£5,492 GBP
$7,370 USD
View
B
Retailer 3
-
£5,732 GBP
$7,692 USD
View
B
Retailer 4
-
£5,767 GBP
$7,739 USD
View
B
Retailer 5
-
£5,933 GBP
$7,962 USD
View
B
Retailer 6
-
£6,005 GBP
CA$11,193 CAD
View
B
Retailer 7
-
£6,125 GBP
$8,220 USD
View
B
Retailer 8
-
£6,159 GBP
$8,265 USD
View
B
Retailer 9
-
£6,267 GBP
$8,410 USD
View
Retailer 10
-
£6,806 GBP
A$14,052 AUD
View
Price last confirmed 9 days ago
B
Retailer 11
-
£6,871 GBP
$9,220 USD
View
B
Retailer 12
-
£6,880 GBP
View
B
Retailer 13
-
£7,081 GBP
$9,502 USD
View
B
Retailer 14
-
£7,295 GBP
$9,790 USD
View
B
Retailer 15
-
£7,295 GBP
$9,790 USD
View
B
Retailer 16
-
£7,534 GBP
$10,110 USD
View
B
Retailer 17
-
£7,647 GBP
€9,773 EUR
View
Retailer 18
-
£8,108 GBP
$10,880 USD
View
Price last confirmed 10 days ago
B
Retailer 19
-
£9,048 GBP
ZAR 196,151 ZAR
View
Most Expensive
B
MOH London
353BC0986 · Nov 1
£10,264 GBP
View
19 more retailers have this diamond
Prices start from £5,459 GBPSave up to £4,805 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
£5,459 GBP