Form to be Used in the Study of the Durability of Important Soil-Forming Minerals. 



1. (a) Name (b) Color. 



(c) Transparency 



t 



2. Cleavage 



3. Hardness 



4. Solubility 



5. Porosity 



Conclusion as to Durability 



1. (a) Name (b) Color. 



(c) Transparency « • • • 



2. Cleavage 



3. Hardness 



4. Solubility •> • 



5. Porosity 



Conclusion as to Durability 



