Gold Prospecting Methods

  The modern gold prospector has advantages that to some extent make up for the increased difficulty of finding ore deposits. One advantage is greatly increased knowledge about the geologic factors that localize ore deposition. The search for new deposits has become a complex undertaking, and the prospector should be as well-informed as possible. The … Read more

Prospecting for Minerals

Prospectors have made a tremendous contribution to the development of this Nation’s mineral resources. Since the time of the earliest settlement, the need for iron for tools and guns, lead for bullets, and copper for utensils has prompted a search for sources of these metals. The lure of gold and silver provided the impetus for … Read more

A Underground Method of Mining Iron Ore

Some ore deposits found in jasper-slates and in the horizon between these and their associated clay-slates; in the latter they are true contact-deposits. They are found in this jasper- and clay-slate formation under varied conditions, yet, in all, certain characteristic laws are preserved. The angle of dip varies from 15° to 20°, and up to … Read more

Fine Rock Crushing with Jaw Crushers

The introduction of a new machine for fine crushing, or The Blake multiple-jaw crusher, which, in combination with the ordinary Blake breaker, could be used in the reduction of ores or any hard and brittle substance to almost any degree of fineness.  How can you use a jaw crusher to crush fine enough to feed … Read more

DANA Mineralogy Book Download

characters depending upon cohesion and elasticity of mineralschemical examination of mineralschemistry of minerals chemical mineralogycompound or twin crystalscrystalline aggregatescrystallography methods of twinningcrystallography morphological relations of crystalselectricity and magnetism vs mineral characteristicshaloids chlorides bromides iodides fluorideshexagonal systemhow to draw of crystal figureshow to measure the angles of crystalshydrocarbon compoundsidentify minerals by taste and odorirregular crystalsisometric systemmineral ... Read more

Effervescing Steel


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Mineral Determination Tables

This contains a series of tables, more or less complete, of minerals arranged according to chemical composition or to certain prominent crystallographic or physical characters. These, it is believed, will be of service not only to the student, but also to the skilled mineralogist. The type used in the printing of the mineral names indicates … Read more