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Cushion|Natural|GIA

1.50ct I SI1 Cushion Natural Diamond

GD • I/SI1 • GIA 2458259458

Shape and cutting style on the report: Cushion modified brilliant

Certificate GIA 2458259458

Diamond specifications and retailer prices

From $10,709 AUD
$7,505 USD
As of November 2, 2026
Save $8,268 AUD (44%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $18,977 AUD at MOH London · As of October 29, 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 standard cut grade stated by the retailer rather than the lab and certified by GIA 2458259458. Listed at 22 retailers as of October 29, 2026, with prices from $10,709 to $18,977, a $8,268 spread on the same certified stone. MOH London lists it at $18,977. 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
I
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2458259458
Dimensions7.42 × 6.03 × 4.12 mm
L/W Ratio1.23
Top View
7.42 mm6.03 mm1.50 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2458259458
Side View
Table 64.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 68.3%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $18,977 AUD|Low: $10,072 AUD|High: $19,104 AUD|Avg: $13,726 AUD|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 9$10,709 AUD
Retailer 6$10,773 AUD
Retailer 7$12,086 AUD
Retailer 8$12,086 AUD
Retailer 3$13,209 AUD
Retailer 5$13,269 AUD
Retailer 2$15,015 AUD
Retailer 4$17,756 AUD
MOH London$18,977 AUD

44 data points across 9 retailers

22 retailers$10,709 AUD to $18,977 AUD

B
Cheapest Retailer
-
$10,709 AUD
$7,505 USD
Retailer 2
-
$10,773 AUD
$7,550 USD
View
Price last confirmed 14 days ago
B
Retailer 3
-
$11,254 AUD
$7,887 USD
View
B
Retailer 4
-
$11,300 AUD
View
B
Retailer 5
-
$11,317 AUD
$7,931 USD
View
B
Retailer 6
-
$11,650 AUD
$8,165 USD
View
B
Retailer 7
-
$11,791 AUD
CA$11,477 CAD
View
B
Retailer 8
-
$12,014 AUD
$8,420 USD
View
B
Retailer 9
-
$12,086 AUD
$8,470 USD
View
B
Retailer 10
-
$12,086 AUD
$8,470 USD
View
Final sale: no returns
B
Retailer 11
-
$12,187 AUD
$8,541 USD
View
B
Retailer 12
-
$13,209 AUD
£7,289 GBP
View
Retailer 13
-
$13,269 AUD
View
Price last confirmed 9 days ago
B
Retailer 14
-
$13,476 AUD
$9,444 USD
View
C
Retailer 15
-
$13,904 AUD
$9,744 USD
View
C
Retailer 16
-
$14,298 AUD
$10,020 USD
View
C
Retailer 17
-
$14,298 AUD
$10,020 USD
View
C
Retailer 18
-
$14,768 AUD
$10,350 USD
View
B
Retailer 19
-
$15,015 AUD
€10,022 EUR
View
Retailer 20
-
$15,911 AUD
$11,151 USD
View
Price last confirmed 10 days ago
C
Retailer 21
-
$17,756 AUD
ZAR 201,028 ZAR
View
Most Expensive
C
MOH London
D404E7B54 · Oct 29
$18,977 AUD
£10,472 GBP
View
21 more retailers have this diamond
Prices start from $10,709 AUDSave up to $8,268 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.

B
1.50ct Cushion
$10,709 AUD