The Phosphate Mineral Group includes a number of the rarer minerals and apatite. Pitchblende or Uraninite is of Color, pitchy black, greenish, or brownish black; powder,
The sampling and estimating of the orebodies in a mines have been made a part of the work of the geological department. The wisdom of
Mica type minerals make a group of silicates of alumina, with potash, iron, magnesia; characterized by easy cleavage into thin, flexible, elastic sheets. Mica gives off
Zircon and Zirconium Minerals; ZrSiO4 are colorless, pale yellow, grayish, yellowish green, brownish yellow, reddish brown; powder, white or nearly so; luster, like diamond, or glassy;
The chemical name for the substance of quartz is silica; and any mineral that is composed in part of silica is a silicate. In the Classification
The mineral pyroxene is a name applied to a group of silicates that are similar in composition to the hornblende group, but not so often
Feldspars constitute a group of similar minerals, which may be described as silicates of aluminum and either potash or soda or lime. Color, white, or pale
This is an introduction list that covers the most common carbonates minerals which are compounds of carbon dioxide (frequently called carbonic acid) with oxides of
Cryolite; Na3AlF6. — Color, snow-white or ice-like, sometimes reddish, brownish, or even black; luster, glassy and greasy; H = 2.5; G = 2.95 to 3;
Oxide minerals can be listed as compounds of oxygen with metals. A list of the common oxide minerals with the spinel structure, together with their compositions,