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Cushion|Natural|GIA

1.50ct K SI1 Cushion Natural Diamond

VG • K/SI1 • GIA 2556551357

Certificate GIA 2556551357

Diamond specifications and retailer prices

From $3,726 AUD
As of November 6, 2026
Save $4,514 AUD (55%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $8,240 AUD at MOH London · As of November 4, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2556551357. Listed at 14 retailers as of November 4, 2026, with prices from $3,726 to $8,240, a $4,514 spread on the same certified stone. MOH London lists it at $8,240. 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
K
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556551357
Dimensions8.26 × 5.54 × 3.93 mm
L/W Ratio1.49
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Needle, Indented Natural, Natural
Top View
8.26 mm5.54 mm1.50 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2556551357
Side View
Table 62.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 70.9%

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: $8,240 AUD|Low: $3,726 AUD|High: $8,358 AUD|Avg: $5,335 AUD|-1.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 9$3,726 AUD
Retailer 2$3,937 AUD
Retailer 6$4,398 AUD
Retailer 3$4,793 AUD
Retailer 7$5,116 AUD
Retailer 10$5,151 AUD
Retailer 8$5,308 AUD
Retailer 4$5,752 AUD
Retailer 5$6,030 AUD
MOH London$8,240 AUD

26 data points across 10 retailers

14 retailers$3,726 AUD to $8,240 AUD

A
Cheapest Retailer
-
$3,726 AUD
A
Retailer 2
-
$3,937 AUD
View
B+
Retailer 3
-
$4,398 AUD
View
B+
Retailer 4
-
$4,630 AUD
View
B+
Retailer 5
-
$4,635 AUD
View
B+
Retailer 6
-
$4,793 AUD
View
B+
Retailer 7
-
$4,908 AUD
View
Retailer 8
-
$4,972 AUD
View
Price last confirmed 21 days ago
B+
Retailer 9
-
$5,116 AUD
View
B+
Retailer 10
-
$5,151 AUD
View
B+
Retailer 11
-
$5,308 AUD
View
B+
Retailer 12
-
$5,752 AUD
View
B
Retailer 13
-
$6,030 AUD
View
Most Expensive
B
MOH London
B558C4967 · Nov 4
$8,240 AUD
£4,458 GBP
View
13 more retailers have this diamond
Prices start from $3,726 AUDSave up to $4,514 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
$3,726 AUD