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Cushion|Natural|GIA

1.20ct K SI2 Cushion Natural Diamond

K/SI2 • GIA 6555120450

Shape and cutting style on the report: Old miner

Certificate GIA 6555120450

Diamond specifications and retailer prices

From $3,857 AUD
$2,650 USD
As of November 6, 2026
2 retailers carry this diamond
Most expensive: $3,857 AUD at Brilliant Earth
View at Brilliant Earth

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 SI2 clarity (slightly-included) and certified by GIA 6555120450. Listed at 2 retailers as of November 6, 2026. 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

1.20
Carat
K
Colour
SI2
Clarity
-
Cut

Specifications

Cut
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555120450
Dimensions7.71 × 5.31 × 3.46 mm
L/W Ratio1.45
Top View
7.71 mm5.31 mm1.20 ctK / SI2
OriginNatural
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6555120450
Side View
Table 59.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 65.1%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 6
Current: $3,857 AUD|Low: $3,449 AUD|High: $4,545 AUD|Avg: $3,951 AUD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 19, 2026
Retailer 3$3,449 AUD
Retailer 2$3,604 AUD
Retailer 5$3,845 AUD
Brilliant Earth$3,857 AUD
Retailer 6$3,879 AUD
Retailer 4$4,545 AUD

8 data points across 6 retailers

2 retailers

Retailer 1
-
$3,845 AUD
Price last confirmed 36 days ago
Most Expensive
B
Brilliant Earth
21541741A · Nov 6
$3,857 AUD
$2,650 USD
View
1 more retailer has this diamond

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
$3,857 AUD