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Cushion|Natural|GIA

1.51ct H SI1 Cushion Natural Diamond

EX • H/SI1 • GIA 6545505052

Certificate GIA 6545505052

Diamond specifications and retailer prices

From £2,827 GBP
$3,794 USD
As of November 2, 2026
Save £3,085 GBP (52%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £5,912 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 6545505052. Listed at 20 retailers as of November 1, 2026, with prices from £2,827 to £5,912, a £3,085 spread on the same certified stone. MOH London lists it at £5,912. 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
SymmetryExcellent
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 6545505052
Dimensions6.54 × 6.46 × 4.50 mm
L/W Ratio1.01
Top View
6.54 mm6.46 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 6545505052
Side View
Table 62.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 69.6%

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 2
Current: £5,912 GBP|Low: £2,827 GBP|High: £5,983 GBP|Avg: £3,846 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 9£2,827 GBP
Retailer 7£2,955 GBP
Retailer 10£3,182 GBP
Retailer 8£3,362 GBP
Retailer 11£3,555 GBP
Retailer 4£3,691 GBP
Retailer 6£3,742 GBP
Retailer 3£4,097 GBP
Retailer 2£4,199 GBP
Retailer 5£4,562 GBP
MOH London£5,912 GBP

44 data points across 11 retailers

20 retailers£2,827 GBP to £5,912 GBP

A
Cheapest Retailer
-
£2,827 GBP
$3,794 USD
A
Retailer 2
-
£2,900 GBP
$3,892 USD
View
A
Retailer 3
-
£2,933 GBP
$3,936 USD
View
A
Retailer 4
-
£2,955 GBP
$3,966 USD
View
Final sale: no returns
A
Retailer 5
-
£2,967 GBP
$3,981 USD
View
A
Retailer 6
-
£3,175 GBP
CA$5,918 CAD
View
A
Retailer 7
-
£3,182 GBP
$4,270 USD
View
A
Retailer 8
-
£3,272 GBP
$4,391 USD
View
B+
Retailer 9
-
£3,362 GBP
$4,512 USD
View
B+
Retailer 10
-
£3,418 GBP
$4,587 USD
View
B+
Retailer 11
-
£3,540 GBP
$4,751 USD
View
B+
Retailer 12
-
£3,555 GBP
$4,771 USD
View
B+
Retailer 13
-
£3,691 GBP
View
Retailer 14
-
£3,742 GBP
A$7,725 AUD
View
Price last confirmed 23 days ago
Retailer 15
-
£4,097 GBP
$5,498 USD
View
Price last confirmed 10 days ago
B+
Retailer 16
-
£4,199 GBP
€5,367 EUR
View
B+
Retailer 17
-
£4,273 GBP
$5,734 USD
View
B
Retailer 18
-
£4,562 GBP
ZAR 98,910 ZAR
View
B
Retailer 19
-
£5,372 GBP
$7,209 USD
View
Most Expensive
B
MOH London
8012FE3A7 · Nov 1
£5,912 GBP
View
19 more retailers have this diamond
Prices start from £2,827 GBPSave up to £3,085 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
£2,827 GBP