Barite is a common
mineral and makes very attractive specimens.
Barite often is an accessory mineral to
other minerals and can make a nice backdrop
to brightly colored crystals ...
Bentonite is a highly absorbent clay-like
substance that helps to lift impacted waste
matter which has accumulated on the walls of
the gastrointestinal tract ...
Dolomite, which is named for the French
mineralogist Deodat de Dolomieu, is a common
sedimentary rock-forming mineral that can be
found in massive beds several hundred feet
thick. They are found all over the world and
are quite common in sedimentary rock
sequences ...
Gilsonite is a natural, resinous
hydrocarbon. This natural asphalt is similar
to hard petroleum asphalt and is often
called a natural asphalt, asphaltite,
uintaite, or asphaltum. Gilsonite is soluble
in aromatic and aliphatic solvents, as well
as petroleum asphalt ...