182 Arrangement of Minerals* 



Genus VI. Dystome-Malachite.* 

 Prismatic. Hemiprismatic. Cleavage imperfect. Colour emerald 

 — blackish-green. Streak lively green. Hardness = 3.5 — 5.0. Sp. 

 gr.= 3.7 — 4.2. 



\ . Prismatic Dystome-Malachite^ or Brochantite. 2. Hemiprismatic 

 Dystome-Malachite {Phosphor-KupfcrerZj Werner. Hydrous 

 Phosphate of Copper), 3. Monotomous Dystome-Malachite, or 

 Erinite {^Hydrous Sub-bisesquiarseniate of Copper, Thomson). 



Genus . CoPPER-GREEN.f 



Amorphous. Streak white. Hardness = 2.0 — 3.0. Sp. gr. = 1.8 

 — 2.2. 



I. Common Copper-Green (Siliceous Malachite,, Kiesellcupfer. Cuivre 

 hydraU Silicieux.) 



Order HI. MICALOCHALCITE.— -Mc«ceoi^^ Saline Ores, 

 Rhombohedral, Prismatic, Pyramidal. Cleavage monoto- 

 mous, very distinct. Hardness = 1.0 — 2.5. Sp. gr. =2.5 



^3.2. 



Genus I. Copper-Mica. 

 Rhombohedral, prismatic. Streak green. Hardness =1.0 — 2.0. 

 Sp. gr. = 2.5 — 3.2. 



1. Rhombohedral Copper-Mica (Arseniate of Copper). 2. Prismatic 

 Copper-Mica (Kupferschaum). 



Genus II. Uran-Mica. 

 Pyramidal. Streak lively green... yellow. Cleavage very distinct- 

 ly axotomous. Hardness = 2.0 — 2.5. Sp. gr. = 3.0 — 3.2. 

 1. Pyramidal Uran-Mica {Phosphate of Uranium), 



Order IV. KERALOCHALCITE.— (7<?m.?ow^ Saline Ores, 

 Not metallic. Streak white or grey. No single distinct 

 cleavage. Hardness = 1.0 — 2.0. Sp. gr. = 5.5 — 6.5. 



Genus I. Horn- Ore. 

 Tessular, pyramidal. Hardness = 1.0 — 2.0. Sp. gr. = 5.5 — 6.5. 

 1. Hexahedral Horn Ore, or Muriate of Silver. 2. Pyramidal Horn- 

 Ore, or Muriate of Mercury. 



{To be concluded in next number.) 



* Dystom, from Jt/y, diffiAndty, and r«/Av&/, to cleave, from the difficulty of 

 obtaining the cleavage. 



t Should Copper-Green prove io be a genus of a sub-order of the order 

 Kuphalochalcite, the chai'acter of the order as here given will require al- 

 teration. 



