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Alum Shales.
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Fireclay.
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Nickel, Ores of.
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Anhydrite.
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Flint and Chert.
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Oil Shale.
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Antimony, Ores of.
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Fluorspar.
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Platinum, Ores of.
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Apatite.
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Ganister.
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Potash Mineral Salts.
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Arsenic, Ores of.
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Gem minerals.
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Quartz Rock.
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Asbestos minerals.
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Gold, Ores of.
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Radioactive Minerals.
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Ball Clay.
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Graphite.
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Refractory Clays.
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Barytes.
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Gypsum.
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Rock Phosphates.
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Bauxite.
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Iron, Ores of.
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Rock Salt.
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Beryl.
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Kaolin.
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Roofing Slate.
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Bismuth, Ores of.
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Laterite.
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Serpentinous Marble.
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Bitumens.
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Lead, Ores of.
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Silica Sand.
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Calcite.
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Lignite.
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Silver, Ores of.
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Chalk.
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Lithomarge.
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Strontium, Ores of.
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China Clay.
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Magnesium, Ores of.
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Sulphur, Ores of.
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Chromite.
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Magnesite.
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Talc and Steatite or
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Coal.
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Manganese, Ores of.
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Soapstone.
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Cobalt, Ores of.
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Marble.
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Tin, Ores of.
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Copper, Ores of.
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Mercury, Ores of.
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Titanium, Ores of
|
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Corundum.
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Mica.
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Tripoli.
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Cryolite.
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Mineral Oils.
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Tungsten, Ores of.
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Diatomaceous Earth.
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Mineral Pigments.
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Witherite.
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Dolomite and Dolomitic Limestone.
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Molybdenite.
Monazite.
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Zinc, Ores of.
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Felspar.
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Natural Gas.
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