CHAPTER III.

DESCRIPTIVE LIST OF USEFUL MINERALS.--The Gems--Precious Metals--Valuable Ores and Useful Minerals of the United States from Agate to Zinc--Their Distinguishing Characters, Uses and Localities--A Mineralogy for Miners--Agate--Alum--Amethyst--Anthracite--Antimony Ore--Asbestus--Asphaltum--Azurite--Baryta--Bituminous Coal--Blende--Bog Iron Ore--Brittle Silver Ore--Brown Coal--Calamine--Cannel Coal--Carnelian--Celestine--Cerussite--Chromic Iron--Cinnabar--Cobalt Pyrites--Copper--Copper Glance--Copper Nickel--Copper Pyrites--Diamond--Emery--Fluor Spar--Franklinite--Galena--Garnet--Gold--Graphite--Gray Copper Ore--Gypsum--Horn Silver--Iron Pyrites--Jasper--Kaolin--Lenticular Iron Ore--Limonite--Magnetic Iron Ore--Magnetic Pyrites--Malachite--Manganese Spar--Marble--Mica--Micaceous Iron Ore--Nitre--Oxyd of Manganese--Platinum--Red Copper Ore--Red Hematite--Red Silver Ore--Rensselaerite--Rock Crystal--Rock Salt--Rutile--Serpentine--Silicate of Copper--Silver--Silver Glance--Smaltine--Smithsonite--Spathic Iron--Specular Iron--Spinel Ruby--Steatite--Strontianite--Sulphur--Tin Ore--Topaz--Tourmaline--Variegated Copper Ore--Wad--Willemite--Zincite.....20