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Cushion|Natural|GIA

1.51ct G SI2 Cushion Natural Diamond

GD • G/SI2 • GIA 2556496790

Certificate GIA 2556496790

Diamond specifications and retailer prices

From $5,570 AUD
As of November 6, 2026
Save $6,277 AUD (53%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $12,975 AUD at Queensmith · As of October 28, 2026
View at Queensmith

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 SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2556496790. Listed at 15 retailers as of November 2, 2026, with a 113% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.51
Carat
G
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556496790
Dimensions7.64 × 5.69 × 3.85 mm
L/W Ratio1.34
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Cavity, Needle
Top View
7.64 mm5.69 mm1.51 ctG / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2556496790
Side View
Table 65.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 67.6%

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: Nov 6
Current: $12,975 AUD|Low: $5,570 AUD|High: $13,031 AUD|Avg: $8,307 AUD|+2.5%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 8$5,570 AUD
Retailer 2$5,902 AUD
Retailer 6$6,558 AUD
Retailer 3$7,168 AUD
Retailer 5$7,325 AUD
Retailer 9$7,439 AUD
Retailer 4$8,371 AUD
Retailer 7$11,847 AUD
Queensmith$12,975 AUD

26 data points across 9 retailers

15 retailers$5,570 AUD to $11,847 AUD

A
Cheapest Retailer
-
$5,570 AUD
A
Retailer 2
-
$5,902 AUD
View
B+
Retailer 3
-
$6,558 AUD
View
B+
Retailer 4
-
$6,781 AUD
View
B+
Retailer 5
-
$6,865 AUD
View
Final sale: no returns
Retailer 6
-
$7,091 AUD
View
Price last confirmed 12 days ago
B+
Retailer 7
-
$7,168 AUD
View
B+
Retailer 8
-
$7,325 AUD
View
Retailer 9
-
$7,439 AUD
View
Price last confirmed 9 days ago
B+
Retailer 10
-
$7,565 AUD
View
B+
Retailer 11
-
$7,660 AUD
View
B+
Retailer 12
-
$7,845 AUD
View
B+
Retailer 13
-
$8,371 AUD
View
B
Retailer 14
-
$11,847 AUD
View
Most Expensive
Queensmith
2556496790 · Oct 28
$12,975 AUD
£7,020 GBP
View
Price last confirmed 9 days ago
14 more retailers have this diamond
Prices start from $5,570 AUDSave up to $6,277 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
$5,570 AUD