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Cushion|Natural|GIA

1.50ct G SI2 Cushion Natural Diamond

EX • G/SI2 • GIA 2558573307

Certificate GIA 2558573307

Diamond specifications and retailer prices

From $6,948 AUD
As of November 6, 2026
Save $6,673 AUD (49%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $14,482 AUD at Queensmith · As of October 28, 2026
View at Queensmith

About this 1.5ct natural cushion diamond

This 1.5ct 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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2558573307. Listed at 15 retailers as of November 4, 2026, with a 96% 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

1.50
Carat
G
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2558573307
Dimensions8.58 × 5.51 × 3.75 mm
L/W Ratio1.56
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Twinning Wisp, Crystal, Cloud, Cavity, Needle, Indented Natural, Natural
Top View
8.58 mm5.51 mm1.50 ctG / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 2558573307
Side View
Table 62.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 68.1%

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 6
Current: $14,482 AUD|Low: $6,893 AUD|High: $14,621 AUD|Avg: $9,709 AUD|+1.7%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 10$6,948 AUD
Retailer 2$7,308 AUD
Retailer 8$8,262 AUD
Retailer 3$8,556 AUD
Retailer 7$8,805 AUD
Retailer 5$8,932 AUD
Retailer 11$9,271 AUD
Retailer 4$9,499 AUD
Retailer 12$9,683 AUD
Retailer 6$10,071 AUD
Retailer 9$13,621 AUD
Queensmith$14,482 AUD

25 data points across 12 retailers

15 retailers$6,948 AUD to $13,621 AUD

A
Cheapest Retailer
-
$6,948 AUD
A
Retailer 2
-
$7,308 AUD
View
Retailer 3
-
$8,006 AUD
View
Price last confirmed 24 days ago
B+
Retailer 4
-
$8,262 AUD
View
B+
Retailer 5
-
$8,545 AUD
View
B+
Retailer 6
-
$8,556 AUD
View
Final sale: no returns
B+
Retailer 7
-
$8,805 AUD
View
B+
Retailer 8
-
$8,932 AUD
View
Retailer 9
-
$9,271 AUD
View
Price last confirmed 9 days ago
B+
Retailer 10
-
$9,419 AUD
View
B+
Retailer 11
-
$9,499 AUD
View
B+
Retailer 12
-
$9,683 AUD
View
B+
Retailer 13
-
$10,071 AUD
View
B
Retailer 14
-
$13,621 AUD
View
Most Expensive
Queensmith
2558573307 · Oct 28
$14,482 AUD
£7,835 GBP
View
Price last confirmed 9 days ago
14 more retailers have this diamond
Prices start from $6,948 AUDSave up to $6,673 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
1.50ct Cushion
$6,948 AUD