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Charoite
Eudialyte
Eudialyte and Charoite Physical Properties


Physical Properties
Tenacity
-  
Brittle  
Solubility
-  
H₂SO₄  
Durability
-  
-  
Specific Gravity
2.54-2.78  
2.74-3.00  
Fracture
Conchoidal  
Uneven  
Cleavage
Good in three directions  
Distinct on {0001} imperfect on {11 2 0}  
Mohs Hardness
5-6  
5-5.5  
Chemical Composition
K(Ca,Na) 2Si 4O 10(OH,F) · H 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references  
Na 4(Ca,Ce) 2(Fe,Mn,Y)ZrSi 8O 22(OH,Cl) 2Ulrich Henn and Claudio C.  
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