DETERMINATION OF MINERALS. 405 



PINITE, p. 312. H.=25-3 5; G. =26-285; lustre feebly waxy; 

 gray, gnh, bnh. B. B. fuses ; yields water. 



DAMOURITE, p. 313. Same as crystallized, p. 403. but in mas- 

 sive aggregation of scales. 



tt Hardness 35 to 6'5; lustre often pearly on a cleavage surface, 

 but elsewhere vitreous. 



PREHNITE, p. 295. H.=6-6 5; GL— 2 8-3; pale green to white; 

 crystals often barrel-shaped, made of grouped tables ; B.B. fuses 

 verv easily ; decomp. by H CI. 



PECTOLITE, p. 293. H.=5 ; G. =2 68-2 8 ; white ; divergent fibrous, 

 or acicular ; B. B. fuses very easily ; gelatinizes imperfectly with 

 HC1. 



APOPHYLLITE, p. 294. H.=45-5 ; G. =23 24 ; white, gnh, ywh, 

 rdh ; dimetric, one perfect pearly cleavage transverse to prism ; 

 B. B. fuses very easily ; a fluorine reaction ; decomp. by H CI. 



CHABAZITE, p. 300. H.=4-5 ; G.=2-2 2 ; rhombohedral, vitreous; 

 white, rdh ; B.B. fuses easily ; decomp. by HC1. 



HARMOTOME, p. 301. H.=45; G.=2'44; white, ywh, rdh; 

 crystals twins, usually cruciform ; B.B. fuses not very easily ; vitre- 

 ous in lustre ; decomp. by H CI. 



STILBITE, p. 302. H.=35-4 ; G. =2-22 ; white, ywh, red ; crys- 

 tallizations often radiated-lamellar ; one perfect pearly cleavage ; 

 B.B. exfoliates, fuses easily ; decomp. by HC1. 



HEULANDITE, p. 303. H.=3 5-4; G.=22; in oblique crystals, 

 with one perfect pearly cleavage ; B.B. same as for stilbite. 



EUCLASE, p. 288. H. =7-5 ; G. =3 1 : in glassy transparent mono- 

 clinic crystals ; B. B. fuses with great difficulty ; gives water in 

 closed tube when strongly ignited. 



Prehnite, apophyllite, chabazite, harmotome, lieulandite, and euclase 

 never occur in fibrous forms. 



fj. Reaction either for phosphorus or boron. 



VIVIANITE, p. 184. H.=15-2; G.=2 55-7; monoclinic with one 

 perfect cleavage ; white, blue, green ; B.B. fuses very easily, the 

 flame bluish green, a gray magnetic globule ; in H CI sol. 



ULEXITE, p. 212. H.=l ; G.=165 ; white, silky, in fine fibres; 

 B.B. fuses very easily, and moistened with sulph. acid flame for an 

 instant green, owing to the boron present ; little sol. in hot water. 

 Priceite (p. 212) is in texture and color like chalk; similar to 

 ulexite in green flame B.B. 

 Borax and Sassolite are other soft minerals containing boron, but 



these have taste. 



b. Anhydrous. 



a. B.B. the flame lithium-red. 



SPODUMENE, p. 248. H. = 65-7; G. =313-319; white, gyh, gnh 

 white, monoclinic (like pyroxene), with I A 7=87°, and perfect 

 cleavage parallel to /and i-i; B.B. swells and fuses. 



