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Cushion|Natural|GIA

0.51ct E SI1 Cushion Natural Diamond

VG • E/SI1 • GIA 1555383416

Certificate GIA 1555383416

Diamond specifications and retailer prices

From $652 AUD
As of November 6, 2026
Save $1,072 AUD (62%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $1,725 AUD at MOH London · As of November 4, 2026
View at MOH London

About this 0.51ct natural cushion diamond

This 0.51ct natural cushion sits in the half to three-quarter carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 1555383416. Listed at 17 retailers as of November 4, 2026, with prices from $652 to $1,725, a $1,072 spread on the same certified stone. MOH London lists it at $1,725. 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

0.51
Carat
E
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1555383416
Dimensions5.31 × 4.24 × 2.92 mm
L/W Ratio1.25
Girdle conditionFaceted
Top View
5.31 mm4.24 mm0.51 ctE / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1555383416
Side View
Table 69.0%CrownGirdle: MED-VTKPavilionCulet: 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: $1,725 AUD|Low: $690 AUD|High: $1,773 AUD|Avg: $1,017 AUD|-2.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 3$690 AUD
Retailer 4$780 AUD
Retailer 6$795 AUD
Retailer 2$806 AUD
Retailer 5$913 AUD
Retailer 7$927 AUD
Retailer 11$936 AUD
Retailer 12$1,041 AUD
Retailer 9$1,109 AUD
Retailer 10$1,140 AUD
Retailer 8$1,158 AUD
MOH London$1,725 AUD

27 data points across 12 retailers

17 retailers$652 AUD to $1,725 AUD

A
Cheapest Retailer
-
$652 AUD
A
Retailer 2
-
$690 AUD
View
Final sale: no returns
A
Retailer 3
-
$780 AUD
View
A
Retailer 4
-
$795 AUD
View
A
Retailer 5
-
$806 AUD
View
B+
Retailer 6
-
$821 AUD
View
B+
Retailer 7
-
$913 AUD
View
B+
Retailer 8
-
$927 AUD
View
Retailer 9
-
$936 AUD
View
Price last confirmed 7 days ago
B+
Retailer 10
-
$1,041 AUD
View
B+
Retailer 11
-
$1,080 AUD
View
B
Retailer 12
-
$1,103 AUD
View
B+
Retailer 13
-
$1,109 AUD
View
B
Retailer 14
-
$1,140 AUD
View
Retailer 15
-
$1,140 AUD
View
Price last confirmed 34 days ago
B+
Retailer 16
-
$1,158 AUD
View
Most Expensive
B
MOH London
99DB9A894 · Nov 4
$1,725 AUD
£933 GBP
View
16 more retailers have this diamond
Prices start from $652 AUDSave up to $1,072 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
0.51ct Cushion
$652 AUD