Arrangement of Minerals. 888 



phylUte), 3. Hypersthene Schillerite. {Prismatoidal Schillerife). 

 4. Radiated Schillerite {Prismatic Schillerite or Radiated Antho- 

 phyllite). 



Genus II. Augite. 

 Prismatic. Hemiprismatic. Tetar to- prismatic. Cleavage not 

 very perfect, and distinctly prismatoidal. No metallic pearly lustre, 

 and no very distinct common pearly lustre. Hardness = 4.5 — 7.0. 

 Sp.gr. =2.7— -3.6. 



1. Pyroxene Augite {Paratomous Avgite). 2. Homblende-Augite 

 {Hemiprismatic Avgite), 3. Epidote- Augite {Prismatoidal Au- 

 gite or Pistacite). 



Genus III. Kyanite. 

 Hemiprismatic and Tetartoprismatic. Cleavage prismatoidal, very 

 perfect and distinct. Common pearly lustre. Hardness = 5.0 — 7.0. 

 Sp.gr. =3.2 — 3.7. 



1. Prismatic Kyanite {Rhatizile, Disthene). 2. Diaspore-Kyanite. 

 3. Prismatoidal Kyanite {Sillimanite). 



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Genus IV. Triphane. 

 Prismatic. Cleavage rather distinct in one direction. Colour not 

 blue. Hardness = 6.0 — 7.0. Sp. gr. = 2.8 — 3.2. 



1. Prismatic Triphane, or Spodumene {Spodumen-wern). 2. Axo- 

 tomous Triphane, or Prehnite. 



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Genus V. Datolite. 

 Prismatic. Cleavage imperfect and difficult. Colour not blue 

 Hardness = 5.0 — 5.5. Sp. gr. = 2.9 — 3.0. 

 1. Prismatic Datolite. 



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Genus VI. Amphigene. 

 Tessular. Cleavage hexahedral, dodecahedral. Streak white — 

 blue. Hardness = 5.5 — 6.0. Sp. gr. = 2.25 — 2.5. 



1. Trapezoidal Amphigene, or Leucitc. 2. Dodecahedral Amphi- 

 gene, or Azure-stone {Sodalite, Spinellane, Nosine, Hauyne, It- 

 ternite, Lapis lazuli). 



Genus VII. Zeolite. 

 Tessular. Rhombohedral. Pyramidal. Prismatic. Hemipris- 

 matic. Hardness = 3.5 — 5.5. Sp. gr. = 2.0 — 2.5. 



1. Hexahedral Zeolite {Analcime). 2. Paratomous Zeolite {Cross-stone, 

 Harmotome). 3. Staurotypous Zeolite {Phillipsite. Lime- 

 ffarmotomef Connell). 4, Rhombohedral Zeolite (Chabasite). 



