More notes at http://tanguay.info/learntracker
C O U R S E 
Our Earth: Its Climate, History, and Processes
David Schultz, University of Manchester
C O U R S E   L E C T U R E 
Rocks and Minerals
Notes taken on July 2, 2015 by Edward Tanguay
naturally occurring
something like glass or concrete would not be a mineral
solid crystalline substance
something like opal is not a mineral, which is simply an amorphous form of silica or non-crystalline solid, lacks the long-range order characteristic of a crystal
usually inorganic
we can have some organic minerals e.g. a compound containing organic food-based acids, such as amino acids and citric acid
has a specific chemical composition
must have a chemical formula that you can write down
commonly known as rock salt, or table salt
the mineral form of sodium chloride (NaCl)
Muscovite mica
very thin sheets
a phyllosilicate (hydrated, with either water or hydroxyl groups attached) mineral of aluminum and potassium with formula KAl2(AlSi3O10)(F,OH)2, or (KF)2(Al2O3)3(SiO2)6(H2O)
naturally occurring
solid aggregate of minerals
could be a single mineral, e.g. a chunk of halite is also considered a rock
is usually a mixture of minerals
also can contain non-mineral solid matter
combustible black or brownish-black sedimentary rock
composed primarily of carbon along with variable quantities of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen