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Alunite
Alunite
☒

Coral
Coral
☒



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Alunite
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Coral
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
Soluble
-
2.6-2.9
Conchoidal, Uneven
On {0001}, perfect
3.5-4
KAl3(SO4)2(OH)6
 
-
-
-
2.60-2.70
Irregular
None
3-4
CaCO 3Ulrich Henn and Claudio C.

Compare Red Gemstones

Red Gemstones

Polyhalite
Polyhalite
Vanadinite
Vanadinite
Jacinth
Jacinth
Coral
Bornite
Coral Vs Bornite
Coral
Carnallite
Coral Vs Carnallite
Coral
Piemontite
Coral Vs Piemontite

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