Carbon
Graphite schist is primarily composed of the mineral graphite, which gives it its characteristic dark color. It also contains other minerals like quartz, mica, and feldspar, along with variable amounts of other accessory minerals depending on the specific geological formation.
In a black pen graphite is used.
yes all of them are minerals.Another AnswerNone of them are minerals: coal, diamonds and graphite are formed from the mineral carbon. There is a class of minerals, according to Wikipedia: "The halide minerals are the group of minerals forming the natural salts."
Volcano + Minerals
Pencils contain graphite, which is a crystalline form of carbon. Graphite is not considered a rock or mineral, as it is composed solely of carbon atoms.
The part of the pencil that does the actual writing, called the pencil lead, is actually made of a mineral called graphite.
patroleum and graphite. sometimes silver is in it too!
cast iron, aluminum, graphite and magnesium
Gold, graphite, halite
graphite, clay, bauxite, etc.
Graphite is a nonsilicate mineral composed primarily of carbon. It does not contain silicate minerals in its chemical composition.