Sulfate minerals and their features

The sulfate minerals are a class of minerals that include the sulfate ion (SO2−4) within their structure. 

Gypsum

Chemical Formula : CaSO4·2H2

Mohs Scale : 1.5 - 2 

Crystal System : Monocilinic

Baryte & Cerussite

Chemical Formula : BaSO4 & PbCO3 

Mohs Scale : 3 -3,5

Crystal System : Orthorhombic

Celestine & Colemanite

Chemical Formula : SrSO4 

Mohs Scale : 3 -3,5

Crystal System : Orthorhombic

From Kütahya, Türkiye


Celestine & Colemanite

From Kütahya, Türkiye


Celestine Geode

Selenite

Chemical Formula : CaSO4·2H2

Mohs Scale : 1.5 - 2 

Crystal System : Monocilinic

Gypsum

Baryte & Vanadinite

Celestine Geode

Gypsum

From Eskişehir, Turkey

Gypsum

Alunite

Chemical Formula : KAl3(SO4)2(OH)6 

Mohs Scale : 3,5-4

Crystal System : Trigonal