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Cushion|Natural|GIA

1.50ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 6551442183

Certificate GIA 6551442183

Diamond specifications and retailer prices

From $3,890 AUD
HK$21,300 HKD
As of November 2, 2026
Save $4,594 AUD (54%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $8,485 AUD at MOH London · As of November 1, 2026
View at MOH London

About this 1.5ct natural cushion diamond

This 1.5ct natural cushion sits in the one-and-a-half to two carat band, graded I 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 6551442183. Listed at 21 retailers as of November 1, 2026, with prices from $3,890 to $8,485, a $4,594 spread on the same certified stone. MOH London lists it at $8,485. 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6551442183
Dimensions7.24 × 5.79 × 3.98 mm
L/W Ratio1.25
Girdle conditionFaceted
Top View
7.24 mm5.79 mm1.50 ctI / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6551442183
Side View
Table 69.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 68.8%

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 2
Current: $8,485 AUD|Low: $3,817 AUD|High: $9,193 AUD|Avg: $5,588 AUD|-7.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 2, 2026
Retailer 13$3,890 AUD
Retailer 3$4,169 AUD
Retailer 8$4,312 AUD
Retailer 6$4,316 AUD
Retailer 18$4,318 AUD
Retailer 4$4,446 AUD
Retailer 10$4,616 AUD
Retailer 17$4,707 AUD
Retailer 2$4,733 AUD
Retailer 14$4,900 AUD
Retailer 12$4,937 AUD
Retailer 19$4,978 AUD
Retailer 11$5,023 AUD
Retailer 16$6,044 AUD
Retailer 5$6,517 AUD
Retailer 7$6,728 AUD
Retailer 15$7,291 AUD
Retailer 9$8,372 AUD
MOH London$8,485 AUD

19 data points across 19 retailers

21 retailers$3,890 AUD to $8,485 AUD

A
Cheapest Retailer
-
$3,890 AUD
HK$21,300 HKD
A
Retailer 2
-
$4,169 AUD
$2,922 USD
View
A
Retailer 3
-
$4,312 AUD
$3,022 USD
View
A
Retailer 4
-
$4,316 AUD
$3,025 USD
View
A
Retailer 5
-
$4,318 AUD
$3,026 USD
View
Final sale: no returns
A
Retailer 6
-
$4,446 AUD
€2,968 EUR
View
A
Retailer 7
-
$4,616 AUD
$3,235 USD
View
A
Retailer 8
-
$4,707 AUD
$3,299 USD
View
A
Retailer 9
-
$4,733 AUD
$3,317 USD
View
A
Retailer 10
-
$4,900 AUD
£2,704 GBP
View
A
Retailer 11
-
$4,937 AUD
$3,460 USD
View
A
Retailer 12
-
$4,978 AUD
£2,747 GBP
View
Retailer 13
-
$5,023 AUD
$3,520 USD
View
Price last confirmed 14 days ago
B+
Retailer 14
-
$5,637 AUD
View
A
Retailer 15
-
$6,044 AUD
€4,034 EUR
View
Retailer 16
-
$6,071 AUD
View
Price last confirmed 24 days ago
B+
Retailer 17
-
$6,517 AUD
ZAR 73,781 ZAR
View
B+
Retailer 18
-
$6,728 AUD
$4,715 USD
View
B+
Retailer 19
-
$7,291 AUD
$5,110 USD
View
Retailer 20
-
$8,372 AUD
$5,867 USD
View
Price last confirmed 9 days ago
Most Expensive
B
MOH London
20437D1FD · Nov 1
$8,485 AUD
£4,682 GBP
View
20 more retailers have this diamond
Prices start from $3,890 AUDSave up to $4,594 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
$3,890 AUD