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Cushion|Natural|GIA

1.51ct H SI1 Cushion Natural Diamond

GD • H/SI1 • GIA 5436497455

Certificate GIA 5436497455

Diamond specifications and retailer prices

From $4,376 AUD
$3,067 USD
As of October 31, 2026
Save $5,147 AUD (54%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $9,523 AUD at MOH London · As of November 2, 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 standard cut grade stated by the retailer rather than the lab and certified by GIA 5436497455. Listed at 20 retailers as of October 31, 2026, with prices from $4,376 to $9,523, a $5,147 spread on the same certified stone. MOH London lists it at $9,523. 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
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5436497455
Dimensions6.39 × 6.28 × 4.34 mm
L/W Ratio1.02
Top View
6.39 mm6.28 mm1.51 ctH / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5436497455
Side View
Table 65.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 69.1%

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: $9,523 AUD|Low: $4,376 AUD|High: $9,637 AUD|Avg: $5,934 AUD|-0.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 3, 2026
Retailer 8$4,376 AUD
Retailer 10$4,473 AUD
Retailer 11$4,762 AUD
Retailer 9$4,950 AUD
Retailer 7$5,158 AUD
Retailer 4$5,365 AUD
Retailer 2$5,825 AUD
Retailer 3$6,105 AUD
Retailer 5$6,441 AUD
Retailer 6$6,999 AUD
MOH London$9,523 AUD

35 data points across 11 retailers

20 retailers$4,376 AUD to $9,523 AUD

A
Cheapest Retailer
-
$4,376 AUD
$3,067 USD
A
Retailer 2
-
$4,473 AUD
$3,135 USD
View
B+
Retailer 3
-
$4,579 AUD
$3,209 USD
View
B+
Retailer 4
-
$4,762 AUD
$3,337 USD
View
Final sale: no returns
A
Retailer 5
-
$4,950 AUD
$3,469 USD
View
B+
Retailer 6
-
$4,958 AUD
$3,475 USD
View
B+
Retailer 7
-
$5,104 AUD
$3,577 USD
View
B+
Retailer 8
-
$5,158 AUD
$3,615 USD
View
B+
Retailer 9
-
$5,163 AUD
$3,619 USD
View
B+
Retailer 10
-
$5,365 AUD
£2,961 GBP
View
B+
Retailer 11
-
$5,514 AUD
$3,864 USD
View
B+
Retailer 12
-
$5,825 AUD
£3,214 GBP
View
B+
Retailer 13
-
$5,836 AUD
$4,090 USD
View
B+
Retailer 14
-
$5,836 AUD
$4,090 USD
View
B+
Retailer 15
-
$6,036 AUD
$4,230 USD
View
Retailer 16
-
$6,105 AUD
View
Price last confirmed 30 days ago
B+
Retailer 17
-
$6,441 AUD
€4,299 EUR
View
Retailer 18
-
$6,445 AUD
$4,517 USD
View
Price last confirmed 10 days ago
B+
Retailer 19
-
$6,999 AUD
ZAR 79,243 ZAR
View
Most Expensive
B
MOH London
595F6FEA4 · Nov 2
$9,523 AUD
£5,255 GBP
View
19 more retailers have this diamond
Prices start from $4,376 AUDSave up to $5,147 AUD

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
$4,376 AUD