CaratHunter
Plans
Cushion|Natural|GIA

1.28ct K SI1 Cushion Natural Diamond

VG • K/SI1 • GIA 7358737542

Certificate GIA 7358737542

Diamond specifications and retailer prices

From $3,922 AUD
As of November 4, 2026
Save $4,600 AUD (54%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $8,523 AUD at MOH London · As of November 4, 2026
View at MOH London

About this 1.28ct natural cushion diamond

This 1.28ct natural cushion sits in the one-and-a-quarter to one-and-a-half 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 7358737542. Listed at 15 retailers as of November 4, 2026, with prices from $3,922 to $8,523, a $4,600 spread on the same certified stone. MOH London lists it at $8,523. 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

1.28
Carat
K
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 7358737542
Dimensions6.42 × 5.66 × 3.77 mm
L/W Ratio1.13
Top View
6.42 mm5.66 mm1.28 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 7358737542
Side View
Table 69.0%CrownGirdle: VTK-ETKPavilionCulet: NoneDepth 66.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $8,523 AUD|Low: $3,997 AUD|High: $8,648 AUD|Avg: $5,271 AUD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 10$3,997 AUD
Retailer 6$4,024 AUD
Retailer 7$4,146 AUD
Retailer 8$4,347 AUD
Retailer 5$4,630 AUD
Retailer 9$4,979 AUD
Retailer 2$5,287 AUD
Retailer 3$5,611 AUD
Retailer 4$6,236 AUD
MOH London$8,523 AUD

45 data points across 10 retailers

15 retailers$3,922 AUD to $8,523 AUD

B+
Cheapest Retailer
-
$3,922 AUD
B+
Retailer 2
-
$3,997 AUD
View
B+
Retailer 3
-
$4,024 AUD
View
B+
Retailer 4
-
$4,094 AUD
View
B+
Retailer 5
-
$4,146 AUD
View
B
Retailer 6
-
$4,347 AUD
View
B
Retailer 7
-
$4,490 AUD
View
Retailer 8
-
$4,630 AUD
View
Price last confirmed 9 days ago
B
Retailer 9
-
$4,979 AUD
View
B
Retailer 10
-
$5,030 AUD
View
B
Retailer 11
-
$5,287 AUD
View
B
Retailer 12
-
$5,611 AUD
View
Retailer 13
-
$5,790 AUD
View
Price last confirmed 15 days ago
B
Retailer 14
-
$6,236 AUD
View
Most Expensive
C
MOH London
2DE41333E · Nov 4
$8,523 AUD
£4,611 GBP
View
14 more retailers have this diamond
Prices start from $3,922 AUDSave up to $4,600 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+
1.28ct Cushion
$3,922 AUD