CaratHunter
Plans
Cushion|Natural|GIA

1.51ct E SI1 Cushion Natural Diamond

GD • E/SI1 • GIA 6551449414

Certificate GIA 6551449414

Diamond specifications and retailer prices

From $4,307 AUD
As of November 6, 2026
Save $5,368 AUD (55%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $9,674 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 E colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6551449414. Listed at 15 retailers as of November 2, 2026, with prices from $4,307 to $9,674, a $5,368 spread on the same certified stone. MOH London lists it at $9,674. 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
E
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6551449414
Dimensions6.21 × 6.16 × 4.37 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Needle
Top View
6.21 mm6.16 mm1.51 ctE / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6551449414
Side View
Table 62.0%CrownGirdle: VTK-ETKPavilionCulet: NoneDepth 70.9%

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: $9,674 AUD|Low: $4,307 AUD|High: $10,003 AUD|Avg: $6,007 AUD|-3.3%
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
November 6, 2026
Retailer 2$4,307 AUD
Retailer 15$4,544 AUD
Retailer 12$4,881 AUD
Retailer 14$5,034 AUD
Retailer 4$5,152 AUD
Retailer 8$5,324 AUD
Retailer 5$5,459 AUD
Retailer 9$5,760 AUD
Retailer 6$5,848 AUD
Retailer 13$6,076 AUD
Retailer 10$6,097 AUD
Retailer 3$6,433 AUD
Retailer 7$6,855 AUD
Retailer 11$6,983 AUD
MOH London$9,674 AUD

20 data points across 15 retailers

15 retailers$4,307 AUD to $9,674 AUD

A
Cheapest Retailer
-
$4,307 AUD
A
Retailer 2
-
$4,544 AUD
View
Final sale: no returns
A
Retailer 3
-
$4,881 AUD
View
A
Retailer 4
-
$5,034 AUD
View
A
Retailer 5
-
$5,152 AUD
View
A
Retailer 6
-
$5,324 AUD
View
A
Retailer 7
-
$5,459 AUD
View
A
Retailer 8
-
$5,760 AUD
View
Retailer 9
-
$5,848 AUD
View
Price last confirmed 8 days ago
A
Retailer 10
-
$6,076 AUD
View
A
Retailer 11
-
$6,097 AUD
View
A
Retailer 12
-
$6,433 AUD
View
Retailer 13
-
$6,541 AUD
View
Price last confirmed 33 days ago
A
Retailer 14
-
$6,983 AUD
View
Most Expensive
B+
MOH London
D9EF38E03 · Nov 2
$9,674 AUD
£5,234 GBP
View
14 more retailers have this diamond
Prices start from $4,307 AUDSave up to $5,368 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
$4,307 AUD