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Cushion|Natural|GIA

0.51ct G SI1 Cushion Natural Diamond

EX • G/SI1 • GIA 1545558858

Certificate GIA 1545558858

Diamond specifications and retailer prices

From $742 AUD
As of November 6, 2026
Save $70 AUD (9%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $812 AUD at Fonder Diamond · As of November 5, 2026
View at Fonder Diamond

About this 0.51ct natural cushion diamond

This 0.51ct natural cushion sits in the half to three-quarter carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1545558858. Listed at 2 retailers as of November 5, 2026, with a relatively tight 9% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Pavilion angle41.1°
OriginNatural
Grading LabGIA
CertificateGIA 1545558858
Dimensions4.68 × 4.66 × 3.12 mm
L/W Ratio1.00
Girdle conditionFaceted
Top View
4.68 mm4.66 mm0.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1545558858
Side View
Table 65.0%CrownGirdle: STK-VTKPavilion 41.1°Culet: NoneDepth 66.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: $812 AUD|Low: $653 AUD|High: $1,295 AUD|Avg: $925 AUD|+0.3%
Fonder Diamond
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
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Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 5, 2026
Retailer 5$653 AUD
Retailer 18$655 AUD
Retailer 6$742 AUD
Retailer 13$745 AUD
Retailer 14$782 AUD
Fonder Diamond$812 AUD
Retailer 19$856 AUD
Retailer 17$863 AUD
Retailer 8$902 AUD
Retailer 9$902 AUD
Retailer 7$931 AUD
Retailer 16$953 AUD
Retailer 2$978 AUD
Retailer 15$1,001 AUD
Retailer 3$1,062 AUD
Retailer 11$1,131 AUD
Retailer 10$1,154 AUD
Retailer 12$1,163 AUD
Retailer 4$1,295 AUD

6 data points across 19 retailers

2 retailers$742 AUD to $812 AUD

A
Cheapest Retailer
-
$742 AUD
Most Expensive
B+
Fonder Diamond
636701768 · Nov 5
$812 AUD
SGD 754 SGD
View
1 more retailer has this diamond
Prices start from $742 AUDSave up to $70 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
$742 AUD