Question

Q8 Write a short note on minerals.​

Answer 1

Answer:

==>Minerals are substances that are formed naturally in the Earth. ... Minerals are usually solid, inorganic, have a crystal structure, and form naturally by geological processes. The study of minerals is called mineralogy. A mineral can be made of single chemical element or more usually a compound.

Explanation:

==>A mineral is a substance that usually

is an inorganic solid. (elemental mercury is an exception)[3]p184[4]

Has a definite chemical make-up

usually has a crystal structure; some do not

is formed naturally by geological processes

One recent definition is:

"A mineral is a homogeneous (which means composed of parts or elements that are all of the same kind) naturally occurring substance with a definite but not necessarily fixed chemical composition. Most minerals are solids with an ordered atomic arrangement, and most are inorganic in the chemical sense of that word".[1]

Alternatively, a mineral is one listed as such by the International Mineralogical Association.[3]

Minerals and rocks Edit

Minerals are different from rocks. A mineral is a chemical compound with a given composition and a defined crystal structure.[5] A rock is a mixture of one or several minerals, in varying proportions.

A rock has only two of the characteristics minerals have–it is a solid and it forms naturally. A rock usually contains two or more types of minerals. Two samples of the same type of rock may have different kinds of minerals in them. Minerals are always made up of the same materials in nearly the same proportions. A ruby is a mineral. Therefore, a ruby found in India has similar makeup as a ruby found in Australia.

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