VI TABLE OF CONTENTS 



Descriptions of minerals — Continued. Page 



Gadolinite 321 



Zoisite 322 



Clinozoisite 324 



Epidote 324 



Prehnite 329 



Custerite 331 



Chondrodite 333 



Ilvaite 334 



Calamine 337 



Tourmaline 341 



Staurolite 344 



Ptilolite 346 



Mordenite 346 



Heulandite 349 



Stilbite 353 



Laumontite 357 



Chabazite 357 



Analcite 360 



Thomsonite 362 



Muscovite 365 



Margarodite 367 



Sericite 367 



Biotite 376 



Chloritoid 377 



Serpentine 383 



Garnierite 384 



Talc 384 



Celadonite 384 



Kaolinite 385 



Montmorillonite and Leverrierite 3S6 



Montmorillonite 387 



Leverrierite 388 



Halloysite 390 



Uranophane 390 



Chrysocolla 391 



Copper pitch ore 395 



Chloropal 397 



Hisingerite 398 



Iddingsite 399 



Titanite 400 



Brannerite 401 



The Niobates-Tantalates 404 



Fergusonite 405 



Columbite 405 



Samarskite 408 



Hielmite 409 



Aeschy nite 409 



Euxenite 410 



Polycrase 410 



Monazite 411 



Apatite 415 



Collophanite 416 



Pyromorphite 418 



