CaratHunter
Plans
Cushion|Natural|GIA

0.51ct D IF Cushion Natural Diamond

EX • D/IF • GIA 1517440925

Certificate GIA 1517440925

Diamond specifications and retailer prices

From $904 AUD
As of November 4, 2026
Save $249 AUD (22%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $1,153 AUD at Blue Nile · As of November 5, 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 D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1517440925. Listed at 5 retailers as of November 4, 2026, with prices from $904 to $1,153, a $249 spread on the same certified stone. Blue Nile lists it at $1,153. Flawless clarity in sub-one-carat stones is rarely visible to the naked eye over VS1, so you are paying a meaningful premium for grade rather than appearance.

The 4Cs

0.51
Carat
D
Colour
IF
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 1517440925
Dimensions4.69 × 4.42 × 2.92 mm
L/W Ratio1.06
Culet sizeNone
Key to symbols
Minor Details of Polish
Top View
4.69 mm4.42 mm0.51 ctD / IF
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1517440925
Side View
Table 63.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 66.1%

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 4
Current: $1,153 AUD|Low: $799 AUD|High: $1,270 AUD|Avg: $1,044 AUD|-9.2%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 5, 2026
Retailer 5$904 AUD
Retailer 4$914 AUD
Retailer 3$1,016 AUD
Retailer 2$1,116 AUD
Retailer 6$1,119 AUD
Blue Nile$1,153 AUD

40 data points across 6 retailers

5 retailers$904 AUD to $1,153 AUD

A
Cheapest Retailer
-
$904 AUD
A
Retailer 2
-
$914 AUD
View
Final sale: no returns
A
Retailer 3
-
$1,016 AUD
View
A
Retailer 4
-
$1,116 AUD
View
Most Expensive
A
Blue Nile
23876430 · Nov 5
$1,153 AUD
$807 USD
View
4 more retailers have this diamond
Prices start from $904 AUDSave up to $249 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
$904 AUD