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Cushion|Natural|GIA

0.51ct E IF Cushion Natural Diamond

GD • E/IF • GIA 6555370030

Certificate GIA 6555370030

Diamond specifications and retailer prices

From $871 AUD
As of November 4, 2026
Save $242 AUD (22%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $1,113 AUD at Blue Nile · As of November 3, 2026
View at Blue Nile

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 IF clarity (flawless or internally-flawless), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6555370030. Listed at 5 retailers as of November 3, 2026, with prices from $871 to $1,113, a $242 spread on the same certified stone. Blue Nile lists it at $1,113. 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
IF
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555370030
Dimensions4.50 × 4.41 × 2.98 mm
L/W Ratio1.02
Culet sizeNone
Key to symbols
Minor Details of Polish
Top View
4.50 mm4.41 mm0.51 ctE / IF
OriginNatural
CutGood
PolishExcellent
SymmetryGood
FluorescenceNone
CertificateGIA 6555370030
Side View
Table 64.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 67.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $1,113 AUD|Low: $757 AUD|High: $1,190 AUD|Avg: $984 AUD|-6.5%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 5, 2026
Retailer 5$871 AUD
Retailer 4$882 AUD
Retailer 3$979 AUD
Retailer 2$1,075 AUD
Blue Nile$1,113 AUD

41 data points across 5 retailers

5 retailers$871 AUD to $1,113 AUD

A
Cheapest Retailer
-
$871 AUD
A
Retailer 2
-
$882 AUD
View
Final sale: no returns
A
Retailer 3
-
$979 AUD
View
B+
Retailer 4
-
$1,075 AUD
View
Most Expensive
A
Blue Nile
29230193 · Nov 3
$1,113 AUD
$781 USD
View
4 more retailers have this diamond
Prices start from $871 AUDSave up to $242 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
$871 AUD