Tabular Vieiv of an At rangement of Minerals. 375 



Genera. 1. Picrosmine. 2. Serpentine. 3. Glyphine-Steatite or 

 Common Steatite. 3. Praseolite. 4. Pyrargillite. 5. Agal- 

 matolite. 6. Gieseckite. 7. Plinthite. 8. Pinite. 9. Gigan- 

 tolite. 10. Gilbertite. 11. Gibbsite. 12. Osmelite. 



OkderII. mica. 



Not metallic. Cleavage distinctly axotomous. Streak 

 white •••green. Hardness = 1*0 — 4'5. Sp. gr. = 23 — 3'4. 



Genera. * 1 Hydrargillite. 2. Brucite or Pearl-Mica. 3. 



Nemalite. 4. Volknerite. 

 **5. Talc. 6. Nacrite. 7. PyrophyHite. 8. Cldorite. 9. Mica. 



10. Biotite. 



OkderIII. spar. 



Not metallic. Sti'eak white, reddish-brown, blue. Hard- 

 ness = 2-5— 7 0. Sp. gr. = 20— 3-7. 



6rCJiera. 1. Schillerite. 2. Kyanite. 3. Diaspore. 4. Triphane. 

 5, Prehnite. 6. Datolito. 1. Wagnerite. 8. Amphigene. 

 9. Zeolite. 10. Edingtonite. 11. Elaine- Spar. 12. Petaiite. 

 13. Felspar. 14. Chiastolite. 16. Augite. 16. Alman- 

 (line-Spar or Eudyalite-Spar. 17- Azure-Spar. 18. Adia- 

 phane Spar. 



OiiDER IV. GEM. 



Not metallic. No metallic adamantine lustre. Streak 

 white. Hardness = 5-5— lO'O. Sp. gr. = 1-9— 4-7. 



Crenera. 1. Andalusite. 2. Corundum. 3. Diamond. 4. Topaz. 

 5. Emerald. 6. Quartz. 7. Axinite. 8. Chrysolite. 9. Bo- 

 racite. 10. Tourmaline. 11. Garnet. 12. Zircon. 



Subclass IV.— METxiLLIFEROUS MINERALS. 



Minerals in which Metals, generally the chief constitu- 

 ents, are in the native state, or combined with Oxygen or 

 Sulphur. 



Order I. ORE or OXIDE. 



Metallic, black, not metallic. Streak not green, not blue. 

 Hardness = 20—7 0. Sp. gr. = 3'4— 80. 



