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Cushion|Natural|GIA

0.51ct D SI2 Cushion Natural Diamond

GD • D/SI2 • GIA 6565226153

Certificate GIA 6565226153

Diamond specifications and retailer prices

From $643 AUD
$452 USD
As of October 31, 2026
Save $157 AUD (20%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $800 AUD at 77 Diamonds · As of November 1, 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 D colour (colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6565226153. Listed at 4 retailers as of October 31, 2026, with prices from $643 to $800, a $157 spread on the same certified stone. 77 Diamonds lists it at $800. 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
D
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6565226153
Dimensions4.53 × 4.43 × 3.01 mm
L/W Ratio1.02
Culet sizeNone
Key to symbols
Crystal
Top View
4.53 mm4.43 mm0.51 ctD / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6565226153
Side View
Table 64.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 68.0%

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 31
Current: $800 AUD|Low: $643 AUD|High: $807 AUD|Avg: $710 AUD|+4.9%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
November 1, 2026
Retailer 2$643 AUD
Retailer 4$655 AUD
Retailer 3$700 AUD
77 Diamonds$800 AUD

39 data points across 4 retailers

4 retailers$643 AUD to $800 AUD

A
Cheapest Retailer
-
$643 AUD
$452 USD
Final sale: no returns
Retailer 2
-
$655 AUD
$460 USD
View
Price last confirmed 11 days ago
B+
Retailer 3
-
$700 AUD
SGD 664 SGD
View
Most Expensive
B+
77 Diamonds
CUSCP6MB47FXP · Nov 1
$800 AUD
£443 GBP
View
3 more retailers have this diamond
Prices start from $643 AUDSave up to $157 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
$643 AUD