CLASSIFICATION OF CRYSTALS. 



425 



Sal-ammoniac 



Witherite. 

 Spar. 



Strontianite. 

 Celesiine. 



Cyanite. 



Christolite. 



Clay. 



Fullers-earth. 



Garnet. 



lolite. 



Nitre 



Calc-spar. 

 Marble. 

 Dolomite. 

 Fluor-spar. 



Jade. 



Emerald. 



Beryl. 



Felspar. 



Obsidian, 



Pumice. 



II. 

 Rock-salt. 



III. 



Gypsum. 

 Apatite. 

 Magnesite. 

 Corundum, 



IV. 



Talc. 



Serpentine. 



Zircon. 



Hornblende. 



Asbestos. 



Augite. 



v. 



Wolfram. Orpiment. 



Molybdenite. Antimony (grey). 



Chromite. Bismuth. 



Pitch-blende. Blende. 



Uranite. Calamine. 



Pyrolusite. Spartalite. 



Wad. Tinstone. 



Manganese-spar. Galena. 



Arsenic. Pyromorphite. 

 Realgar. 



The above is the arrangement best suited for beginners. 



Iron-pyrites. 



Mispickel. 



Magnetic iron ore. 



Micaceous iron. 



Hematite. 



Spathic iron. 



Cobalt. 



Copper. 



Oxides of copper. 



Borax. 



Sapphire. 

 Emery. 

 Turquoise. 

 Alum-s-tone, 



Diallage 



Topaz. 



Tourmaline. 



Lapis-lazuli. 



Chrysoberyl 



Copper pyrites. 



Azurite 



Malachite 



Mercury 



Cinnabar. 



Silver. 



Gold. 



Platinum. 



Palladium. 



Professor Nichol prefers the following arrangement : 



ORDER I. THE OXIDISED STONES. 



Quartz. Serpentine. 



Felspar. Hornblende. 



Scapolite. Clays. 



Haloid stones. Garnet. 



Leucite. Cyanite. 



Zeolite. Gems. 



Mica. Metallic stones. 



ORDER II. SALINE STONES. 



Calc-spar. Gypsum. 



Fluor-spar. Rock-salt. 

 Heavy- spar. 



Sparry iron ores. 

 Iron salts. 



Iron ores. 

 Tinstone. 

 Manganese ores. 



ORDER III. SALINE ORES. 



Copper salts. 



Lead salts. 

 ORDER IV. OXIDIZED ORES. 



Red copper ores. 

 White antimony ores. 



