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Cushion|Natural|GIA

1.51ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 6542714039

Certificate GIA 6542714039

Diamond specifications and retailer prices

From $4,806 AUD
As of November 6, 2026
Save $5,883 AUD (55%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $10,689 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 I 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 6542714039. Listed at 20 retailers as of November 2, 2026, with prices from $4,806 to $10,689, a $5,883 spread on the same certified stone. MOH London lists it at $10,689. 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle30.8°
OriginNatural
Grading LabGIA
CertificateGIA 6542714039
Dimensions7.36 × 5.88 × 4.04 mm
L/W Ratio1.25
Top View
7.36 mm5.88 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6542714039
Side View
Table 64.0%CrownGirdle: STK-THKPavilion 30.8°Culet: NoneDepth 68.8%

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 6
Current: $10,689 AUD|Low: $4,806 AUD|High: $10,974 AUD|Avg: $6,786 AUD|-2.6%
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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 7, 2026
Retailer 17$4,806 AUD
Retailer 7$5,448 AUD
Retailer 16$5,529 AUD
Retailer 9$5,718 AUD
Retailer 3$5,851 AUD
Retailer 6$5,954 AUD
Retailer 19$5,979 AUD
Retailer 14$6,056 AUD
Retailer 12$6,113 AUD
Retailer 18$6,135 AUD
Retailer 2$6,136 AUD
Retailer 11$6,200 AUD
Retailer 5$6,347 AUD
Retailer 8$6,571 AUD
Retailer 10$6,644 AUD
Retailer 13$7,289 AUD
Retailer 15$7,903 AUD
Retailer 4$10,084 AUD
MOH London$10,689 AUD

20 data points across 19 retailers

20 retailers$4,806 AUD to $10,689 AUD

A
Cheapest Retailer
-
$4,806 AUD
A
Retailer 2
-
$5,448 AUD
View
A
Retailer 3
-
$5,529 AUD
View
Retailer 4
-
$5,718 AUD
View
Price last confirmed 10 days ago
A
Retailer 5
-
$5,851 AUD
View
A
Retailer 6
-
$5,954 AUD
View
A
Retailer 7
-
$5,979 AUD
View
Final sale: no returns
A
Retailer 8
-
$6,056 AUD
View
A
Retailer 9
-
$6,113 AUD
View
A
Retailer 10
-
$6,135 AUD
View
A
Retailer 11
-
$6,136 AUD
View
Retailer 12
-
$6,200 AUD
View
Price last confirmed 8 days ago
A
Retailer 13
-
$6,347 AUD
View
Retailer 14
-
$6,571 AUD
View
Price last confirmed 8 days ago
Retailer 15
-
$6,644 AUD
View
Price last confirmed 18 days ago
Retailer 16
-
$7,191 AUD
View
Price last confirmed 29 days ago
B+
Retailer 17
-
$7,289 AUD
View
B+
Retailer 18
-
$7,903 AUD
View
B
Retailer 19
-
$10,084 AUD
View
Most Expensive
B
MOH London
87E195438 · Nov 2
$10,689 AUD
£5,783 GBP
View
19 more retailers have this diamond
Prices start from $4,806 AUDSave up to $5,883 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
$4,806 AUD