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Cushion|Natural|GIA

1.50ct D SI2 Cushion Natural Diamond

GD • D/SI2 • GIA 6551664558

Certificate GIA 6551664558

Diamond specifications and retailer prices

From $5,722 AUD
HK$31,400 HKD
As of October 31, 2026
Save $7,278 AUD (56%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $12,999 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 D colour (colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6551664558. Listed at 15 retailers as of October 28, 2026, with prices from $5,722 to $12,999, a $7,278 spread on the same certified stone. Queensmith lists it at $12,999. 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

1.50
Carat
D
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6551664558
Dimensions7.73 × 5.95 × 4.07 mm
L/W Ratio1.30
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cavity, Needle, Indented Natural
Top View
7.73 mm5.95 mm1.50 ctD / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6551664558
Side View
Table 64.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 68.4%

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: $12,999 AUD|Low: $5,685 AUD|High: $13,090 AUD|Avg: $8,313 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
Retailer 13
October 31, 2026
Retailer 6$5,722 AUD
Retailer 2$6,135 AUD
Retailer 5$6,751 AUD
Retailer 3$7,055 AUD
Retailer 9$7,224 AUD
Retailer 12$7,288 AUD
Retailer 8$7,458 AUD
Retailer 10$7,643 AUD
Retailer 4$7,862 AUD
Retailer 13$8,043 AUD
Retailer 7$8,650 AUD
Retailer 11$12,189 AUD
Queensmith$12,999 AUD

24 data points across 13 retailers

15 retailers$5,722 AUD to $12,999 AUD

A
Cheapest Retailer
-
$5,722 AUD
HK$31,400 HKD
A
Retailer 2
-
$6,135 AUD
₹410,417 INR
View
A
Retailer 3
-
$6,751 AUD
SGD 6,408 SGD
View
B+
Retailer 4
-
$7,018 AUD
$4,930 USD
View
B+
Retailer 5
-
$7,055 AUD
$4,956 USD
View
Final sale: no returns
A
Retailer 6
-
$7,224 AUD
£3,996 GBP
View
B+
Retailer 7
-
$7,288 AUD
SGD 6,918 SGD
View
A
Retailer 8
-
$7,458 AUD
£4,125 GBP
View
B+
Retailer 9
-
$7,643 AUD
$5,369 USD
View
B+
Retailer 10
-
$7,862 AUD
$5,522 USD
View
B+
Retailer 11
-
$8,043 AUD
$5,650 USD
View
B+
Retailer 12
-
$8,243 AUD
View
B+
Retailer 13
-
$8,650 AUD
€5,787 EUR
View
B
Retailer 14
-
$12,189 AUD
£6,742 GBP
View
Most Expensive
B
Queensmith
6551664558 · Oct 28
$12,999 AUD
£7,190 GBP
View
14 more retailers have this diamond
Prices start from $5,722 AUDSave up to $7,278 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
$5,722 AUD