CONTENTS 
INTRODUCTION. 
Page 
III. FELSPATHIC MINERALS— 
Form of Minerals ... 1 
Crystals .... 1 
Irregularities of Crystals . . 3 
Non-crystallised, irregular forms . 3 
Hardness .... 3 
Specific Gravity ... 4 
Characters depending on Light and Colour 4 
Relations to Electricity, Magnetism, and Heat 4 
Chemical Relations ... 5 
Relations of Chemical Constitution to Form 6 
Table of Chemical Elements . . 7-11 
Potash Felspar, Orthoclase 
Soda-felspar, Albite, Pericline 
Porphyry 
Labrador Felspar, Calcareous Felspar 
IV. MICACEOUS MINERALS— 
Pennine or Rhomhohedral Mica . 
Common or Biaxial Mica 
Chlorite, Ripidolite 
Talc, Pyrophyllite 
Granite . 
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SPECIAL MINERALOGY. 
I. PRECIOUS STONES ok GEMS— 
Diamond . . . .12 
Corundite, Sapphire, Ruby . . 13 
Chrysobervl, Cymophane, Alexandrite . 13 
Spinel . . . . .13 
Zircon, Hyacinth . . .14 
Beryl, Emerald . . . .14 
Topaz . . . .14 
Garnet . . , .15 
Vesuvian, Idoerase . . .15 
Chrysolite, Olivine . . .15 
Epidote, Pistacite . . .15 
Turquoise, Calaite . , .16 
Lazurite or Lapis Lazuli . . 16 
Quartz, Silica, Silicates . . .16 
Opal, Amorphous Quartz . . 18 
Cyanite, Disthene . , .18 
Staurolite . . . .18 
Andalusite . . . ’19 
Tourmaline, Electric Schorl . . 19 
Pelioma, Dichroite, Cordierite . . 19 
II. HORNBLENDE and AUGITTC MINERALS— 
Augite, Pyroxene, Diopside, etc. . , 20 
Hornblende, Amphibole, Pargasite . 20 
Hypersthene, Paulite . . .20 
Asbestus, Mountain-wood . . 21 
Serpentine, Steatite, Ophite . . 21 
Schiller-spar, Eclogite, Omphacite . 21 
Y. ZEOLITIC MINERALS— 
Leucite, White Garnet, Amphigene 
25 
Zeolite, Mesotvpe, Natrolite 
25 
Heulandite 
26 
Stilbite, Desmin 
26 
Amalcime, Cubizite, Sarcolite 
26 
Apophyllite, Ichthyophthalmite 
26 
CAREOUS MINERALS— 
Carbonate of Lime 
a 
27 
Calcite, or Rhombohedral Carbonate of 
Lime 
28 
Chalk-marl 
28 
Arragonite . . . 
29 
Bitter Spar, Brown Spar, and Dolomite 
29 
Breunerite, Pistomesite . 
29 
Periclase 
29 
Brucite, Meerschaum, Steatite 
30 
Gypsum 
30 
Anhydrite 
30 
Apatite, Phosphorite 
31 
Fluor-spar, Fluoride of Calcium . 
31 
VII. COMPOUNDS OF BARYTA— 
Witherite, Carbonate of Baryta . . 32 
Heavy Spar, Sulphate of Baryta . 32 
Baryto-Calcite and Alstonite . . 32 
VIII. COMPOUNDS OF STRONTIA— 
Strontianite, Carbonate of Strontia . 32 
Celestine, Sulphate of Strontia . . 33 
