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Cushion|Natural|GIA

1.51ct H SI2 Cushion Natural Diamond

EX • H/SI2 • GIA 5546300939

Certificate GIA 5546300939

Diamond specifications and retailer prices

From $4,369 AUD
$3,062 USD
As of November 2, 2026
Save $4,114 AUD (48%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $8,483 AUD 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5546300939. Listed at 14 retailers as of November 1, 2026, with prices from $4,369 to $8,483, a $4,114 spread on the same certified stone. MOH London lists it at $8,483. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.42°
Pavilion angle31.98°
OriginNatural
Grading LabGIA
CertificateGIA 5546300939
Dimensions6.35 × 6.22 × 4.34 mm
L/W Ratio1.02
Top View
6.35 mm6.22 mm1.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5546300939
Side View
Table 61.0%Crown 38.42°Girdle: THK-VTKPavilion 31.98°Culet: NoneDepth 69.7%

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: $8,483 AUD|Low: $4,369 AUD|High: $10,003 AUD|Avg: $5,894 AUD|-14.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 2, 2026
Retailer 12$4,369 AUD
Retailer 3$4,383 AUD
Retailer 7$4,744 AUD
Retailer 4$4,874 AUD
Retailer 13$4,984 AUD
Retailer 9$5,041 AUD
Retailer 8$5,265 AUD
Retailer 11$5,265 AUD
Retailer 6$5,352 AUD
Retailer 10$5,436 AUD
Retailer 2$5,639 AUD
Retailer 5$7,395 AUD
MOH London$8,483 AUD

43 data points across 13 retailers

14 retailers$4,369 AUD to $8,483 AUD

A
Cheapest Retailer
-
$4,369 AUD
$3,062 USD
A
Retailer 2
-
$4,383 AUD
$3,072 USD
View
A
Retailer 3
-
$4,744 AUD
CA$4,617 CAD
View
A
Retailer 4
-
$4,874 AUD
$3,416 USD
View
A
Retailer 5
-
$4,984 AUD
$3,493 USD
View
A
Retailer 6
-
$5,041 AUD
$3,533 USD
View
A
Retailer 7
-
$5,265 AUD
$3,690 USD
View
A
Retailer 8
-
$5,265 AUD
$3,690 USD
View
A
Retailer 9
-
$5,352 AUD
£2,953 GBP
View
A
Retailer 10
-
$5,436 AUD
$3,810 USD
View
A
Retailer 11
-
$5,639 AUD
€3,764 EUR
View
A
Retailer 12
-
$6,037 AUD
CA$5,876 CAD
View
Retailer 13
-
$7,395 AUD
$5,182 USD
View
Price last confirmed 10 days ago
Most Expensive
B+
MOH London
CC9B938F1 · Nov 1
$8,483 AUD
£4,681 GBP
View
13 more retailers have this diamond
Prices start from $4,369 AUDSave up to $4,114 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
$4,369 AUD