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

1 answer:

7 0

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.

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