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



1. (a) Name (b) Color. 



(c) Transparency 



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 



10 



