List the five characteristics a substance must have to be a mineral. Explain why coal and a glass marble are not minerals.

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20-10-2017
Biology

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List the five characteristics a substance must have to be a mineral. Explain why coal and a glass marble are not minerals.

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cocoh13 cocoh13 · Answer 1 · 2017-10-20T04:46:19+02:00

A mineral has to be naturally occurring, inorganic, solid, have a crystal structure, and have a definite chemical composition. Coal is not a mineral because it is carbon-based and came from fossilized plants. That proves that it is organic and has no definite chemical composition, defying two rules you would need to follow to be a mineral. Glass is a non-crystalline solid. This means that the atoms are not arranged in a regular and repeating pattern. A mineral by definition possess a crystalline form, it has its elements arranged in a regular and repeating pattern.

PratikshaS PratikshaS · Answer 2 · 2022-05-31T16:55:14+02:00

Minerals are naturally occurring, crystalized, inorganic, solid and have definite composition. Coal is an organic substance whereas glass is a non-crystalline solid so they are not minerals.

What are minerals?

"A mineral is a chemical element required as an essential nutrient by organisms to perform functions necessary for life."
The minerals are crystalline inorganic solid occurring naturally.
They have definite composition.

What do you mean by inorganic?

"An inorganic compound is typically a chemical compound that lacks carbon–hydrogen bond."
They are not obtained from living things.

What do you mean by definite composition?

This means that the substances have fixed proportions by weight.

Coal is an organic substances derived from remains of plants and glass is a non-crystalline solid. So they are not termed as minerals.

Hence, the minerals are naturally occurring, crystalline inorganic solid, having definite composition.

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