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Cushion|Natural|GIA

1.51ct G SI1 Cushion Natural Diamond

EX • G/SI1 • GIA 2556256739

Certificate GIA 2556256739

Diamond specifications and retailer prices

From $4,902 AUD
$3,443 USD
As of October 31, 2026
Save $3,883 AUD (44%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $9,135 AUD at Wholesale Diamonds Direct · As of October 23, 2026
View at Wholesale Diamonds Direct

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two 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 2556256739. Listed at 14 retailers as of October 31, 2026, with a 79% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.51
Carat
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556256739
Dimensions6.77 × 6.05 × 4.21 mm
L/W Ratio1.12
Culet sizeNone
Top View
6.77 mm6.05 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556256739
Side View
Table 61.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 69.6%

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: Oct 31
Current: $5,714 AUD|Low: $4,902 AUD|High: $9,667 AUD|Avg: $6,599 AUD|-5.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Wholesale Diamonds Direct
November 2, 2026
Retailer 10$4,902 AUD
Retailer 9$4,981 AUD
Retailer 6$4,993 AUD
Retailer 7$5,237 AUD
Retailer 4$5,353 AUD
Retailer 1$5,714 AUD
Retailer 8$6,184 AUD
Retailer 12$6,230 AUD
Retailer 2$6,296 AUD
Retailer 5$7,649 AUD
Retailer 11$8,267 AUD
Retailer 3$8,785 AUD
Wholesale Diamonds Direct$9,135 AUD

34 data points across 13 retailers

14 retailers$4,902 AUD to $8,785 AUD

A
Cheapest Retailer
-
$4,902 AUD
$3,443 USD
A
Retailer 2
-
$4,981 AUD
$3,499 USD
View
Retailer 3
-
$4,993 AUD
SGD 4,740 SGD
View
Price last confirmed 9 days ago
A
Retailer 4
-
$5,237 AUD
$3,679 USD
View
A
Retailer 5
-
$5,353 AUD
SGD 5,081 SGD
View
A
Retailer 6
-
$5,714 AUD
£3,161 GBP
View
A
Retailer 7
-
$6,184 AUD
$4,344 USD
View
A
Retailer 8
-
$6,230 AUD
$4,376 USD
View
A
Retailer 9
-
$6,296 AUD
$4,423 USD
View
A
Retailer 10
-
$6,386 AUD
$4,486 USD
View
A
Retailer 11
-
$7,649 AUD
$5,373 USD
View
B+
Retailer 12
-
$8,267 AUD
$5,807 USD
View
B+
Retailer 13
-
$8,785 AUD
$6,171 USD
View
Most Expensive
Wholesale Diamonds Direct
444917139 · Oct 23
$9,135 AUD
$6,417 USD
View
Price last confirmed 9 days ago
13 more retailers have this diamond
Prices start from $4,902 AUDSave up to $3,883 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
1.51ct Cushion
$4,902 AUD