96 The Philippine Journal of Science 



Werneritc — Intel-mediate between Ca^Al^Si^Ooj and NajAl-SisOo^Cl. 

 Wemerite is a white fibrous silicate, and occurs in veinlets in 

 greenstone in Aroroy district, Masbate. No economic use is 

 made of it. 



Wolframite— (FeMn) WO,. 



Wolframite is a heavy, black, crystalline mineral. Specimens 

 are said to have l>een found in Antique Province, Panay. There 

 is no economic development. 



Zeolite — Composition is uncertain. RAl.SiioO,,. 



Zeolite occurs as a fibrous secondary product in the decomposi- 

 tion of certain rock minerals, principally feldspars, and in amyg- 

 doloidal cavities throughout the Islands. This mineral has no 

 known use. 



