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Cushion|Natural|GIA

1.20ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 1555689564

Certificate GIA 1555689564

Diamond specifications and retailer prices

From $3,407 AUD
As of November 6, 2026
Save $3,260 AUD (49%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $6,667 AUD at MOH London · As of November 2, 2026
View at MOH London

About this 1.2ct natural cushion diamond

This 1.2ct natural cushion sits in the classic one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1555689564. Listed at 8 retailers as of November 2, 2026, with prices from $3,407 to $6,667, a $3,260 spread on the same certified stone. MOH London lists it at $6,667. 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

1.20
Carat
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1555689564
Dimensions7.26 × 5.38 × 3.70 mm
L/W Ratio1.35
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Cavity, Needle
Top View
7.26 mm5.38 mm1.20 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1555689564
Side View
Table 63.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 68.8%

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 6
Current: $6,667 AUD|Low: $2,578 AUD|High: $6,747 AUD|Avg: $3,633 AUD|+44.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 3$2,578 AUD
Retailer 11$2,640 AUD
Retailer 10$2,885 AUD
Retailer 8$3,407 AUD
Retailer 6$3,598 AUD
Retailer 2$3,656 AUD
Retailer 7$3,762 AUD
Retailer 9$4,010 AUD
Retailer 4$4,266 AUD
Retailer 5$4,644 AUD
MOH London$6,667 AUD

34 data points across 11 retailers

8 retailers$3,407 AUD to $6,667 AUD

B+
Cheapest Retailer
-
$3,407 AUD
B+
Retailer 2
-
$3,598 AUD
View
B+
Retailer 3
-
$3,656 AUD
View
B
Retailer 4
-
$3,762 AUD
View
B
Retailer 5
-
$4,010 AUD
View
B
Retailer 6
-
$4,266 AUD
View
B
Retailer 7
-
$4,644 AUD
View
Most Expensive
B
MOH London
57F3EF09A · Nov 2
$6,667 AUD
£3,607 GBP
View
7 more retailers have this diamond
Prices start from $3,407 AUDSave up to $3,260 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+
1.20ct Cushion
$3,407 AUD