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Cushion|Natural|GIA

0.51ct E SI2 Cushion Natural Diamond

GD • E/SI2 • GIA 6521487057

Certificate GIA 6521487057

Diamond specifications and retailer prices

From $478 AUD
$336 USD
As of October 29, 2026
Save $240 AUD (33%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $718 AUD at 77 Diamonds · As of October 30, 2026
View at 77 Diamonds

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 SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6521487057. Listed at 4 retailers as of October 29, 2026, with prices from $478 to $718, a $240 spread on the same certified stone. 77 Diamonds lists it at $718. 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
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6521487057
Dimensions4.69 × 4.34 × 2.95 mm
L/W Ratio1.08
Top View
4.69 mm4.34 mm0.51 ctE / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6521487057
Side View
Table 60.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 67.9%

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: Oct 29
Current: $718 AUD|Low: $414 AUD|High: $718 AUD|Avg: $559 AUD|+6.3%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
October 30, 2026
Retailer 2$478 AUD
Retailer 4$506 AUD
Retailer 3$558 AUD
77 Diamonds$718 AUD

41 data points across 4 retailers

4 retailers$478 AUD to $718 AUD

B+
Cheapest Retailer
-
$478 AUD
$336 USD
Final sale: no returns
A
Retailer 2
-
$506 AUD
MYR 1,449 MYR
View
B+
Retailer 3
-
$558 AUD
$392 USD
View
Most Expensive
B+
77 Diamonds
CUSCPKGEJRWZC · Oct 30
$718 AUD
£397 GBP
View
3 more retailers have this diamond
Prices start from $478 AUDSave up to $240 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
$478 AUD