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Cushion|Natural|GIA

0.51ct D SI1 Cushion Natural Diamond

ID • D/SI1 • GIA 6302501392

Certificate GIA 6302501392

Diamond specifications and retailer prices

From $1,579 AUD
As of November 5, 2026
Save $1,713 AUD (52%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $3,292 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6302501392. Listed at 8 retailers as of November 4, 2026, with prices from $1,579 to $3,292, a $1,713 spread on the same certified stone. MOH London lists it at $3,292. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.51
Carat
D
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6302501392
Dimensions4.65 × 4.43 × 3.01 mm
L/W Ratio1.05
Top View
4.65 mm4.43 mm0.51 ctD / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6302501392
Side View
Table 64.0%CrownGirdle: THN-VTKPavilionCulet: NoneDepth 67.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $3,292 AUD|Low: $694 AUD|High: $3,340 AUD|Avg: $2,094 AUD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 4$694 AUD
Retailer 3$2,056 AUD
Retailer 2$2,353 AUD
MOH London$3,292 AUD

41 data points across 4 retailers

8 retailers$1,579 AUD to $3,292 AUD

B+
Cheapest Retailer
-
$1,579 AUD
B
Retailer 2
-
$2,038 AUD
View
B
Retailer 3
-
$2,038 AUD
View
B
Retailer 4
-
$2,056 AUD
View
B
Retailer 5
-
$2,110 AUD
View
B
Retailer 6
-
$2,353 AUD
View
B
Retailer 7
-
$2,963 AUD
View
Most Expensive
B
MOH London
28F4671AA · Nov 4
$3,292 AUD
£1,781 GBP
View
7 more retailers have this diamond
Prices start from $1,579 AUDSave up to $1,713 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.

B+
0.51ct Cushion
$1,579 AUD