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Cushion|Natural|GIA

1.51ct K SI1 Cushion Natural Diamond

VG • K/SI1 • GIA 5556305352

Certificate GIA 5556305352

Diamond specifications and retailer prices

From $3,427 AUD
As of November 6, 2026
Save $3,953 AUD (54%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $7,380 AUD at MOH London · As of November 4, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 5556305352. Listed at 17 retailers as of November 4, 2026, with prices from $3,427 to $7,380, a $3,953 spread on the same certified stone. MOH London lists it at $7,380. 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
K
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5556305352
Dimensions7.51 × 5.76 × 4.19 mm
L/W Ratio1.30
Girdle conditionFaceted
Top View
7.51 mm5.76 mm1.51 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5556305352
Side View
Table 68.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 72.8%

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: $7,380 AUD|Low: $3,371 AUD|High: $7,711 AUD|Avg: $4,690 AUD|-4.3%
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
Retailer 14
Retailer 15
Retailer 16
November 7, 2026
Retailer 4$3,427 AUD
Retailer 6$3,433 AUD
Retailer 12$3,659 AUD
Retailer 13$3,701 AUD
Retailer 14$3,719 AUD
Retailer 16$3,937 AUD
Retailer 8$3,995 AUD
Retailer 5$4,206 AUD
Retailer 9$4,293 AUD
Retailer 3$4,308 AUD
Retailer 7$4,538 AUD
Retailer 2$4,697 AUD
Retailer 10$5,151 AUD
Retailer 11$5,401 AUD
Retailer 15$7,070 AUD
MOH London$7,380 AUD

25 data points across 16 retailers

17 retailers$3,427 AUD to $7,380 AUD

A
Cheapest Retailer
-
$3,427 AUD
A
Retailer 2
-
$3,433 AUD
View
A
Retailer 3
-
$3,659 AUD
View
A
Retailer 4
-
$3,701 AUD
View
Final sale: no returns
A
Retailer 5
-
$3,719 AUD
View
A
Retailer 6
-
$3,937 AUD
View
B+
Retailer 7
-
$3,995 AUD
View
A
Retailer 8
-
$4,206 AUD
View
A
Retailer 9
-
$4,293 AUD
View
A
Retailer 10
-
$4,308 AUD
View
Retailer 11
-
$4,538 AUD
View
Price last confirmed 18 days ago
B+
Retailer 12
-
$4,697 AUD
View
B+
Retailer 13
-
$4,784 AUD
View
B+
Retailer 14
-
$5,151 AUD
View
B+
Retailer 15
-
$5,401 AUD
View
B
Retailer 16
-
$7,070 AUD
View
Most Expensive
B
MOH London
83913B52F · Nov 4
$7,380 AUD
£3,993 GBP
View
16 more retailers have this diamond
Prices start from $3,427 AUDSave up to $3,953 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
$3,427 AUD