Inosilicates

Rhodonite

 Chemical Formula: CaMn3Mn[Si5O15] 

 Mohs Scale : 5.5 - 6.5 

 Crystal System : Tricilinc

*Rhodonite is the official gemstone of the Commonwealth of Massachusetts. 

Actinolite

Chemical Formula : Ca2(Mg4.5-2.5Fe2+0.5-2.5)Si8O22(OH)2 

Mohs Scale : 5-6

Crystal System : Monoclinic

Diopside

  Chemical Formula : MgCaSi2O6 

  Mohs Scale : 5.5 - 6.5

  Crystal System : Monoclinic

Nephrite

  Chemical Formula : Ca2(Mg,Fe)5Si8O22(OH)2 

  Mohs Scale : 6 - 6.5

  Crystal System : Monoclinic

Charoite

 Chemical Formula : K(Ca,Na)2Si4O10(OH,F)•H2


  Mohs Scale : 5 - 6 

  Crystal System : Monoclinic

Rhodonite

From Güzelbahçe İzmir, Turkey

Prehnite

 Chemical Formula : Ca2Al(AlSi3O10)(OH)2 


  Mohs Scale : 6- 6,5

  Crystal System : Orthorhombic

Jadeite

Chemical Formula : Na(Al,Fe3+)Si2O6 


  Mohs Scale : 6.5, 7

  Crystal System : Monoclinic