Why is glass marble not considered a mineral?

Answer 1

In order to be a mineral, substances need to have fixed internal crystalline structure. Natural glass does not.

Answer 2

A mineral is a naturally occurring inorganic element or compound having an orderly internal structure and characteristic chemical composition, crystal morphology and physical properties such as density and hardness. Minerals are the fundamental units from which most rocks are made.

It is not a mineral because, Obsidian (volcanic glass), has no orderly internal structure

Answer 3

There are two reasons why glass marbles are not considered minerals. Minerals, by definition have a crystalline structure that is regular and repeating. Secondly, glass marbles are man-made out of silica and other ingredients.

Answer 4

A mineral is crystalline, and glass is not.

Answer 5

Glass is not a mineral because is doesn't have a crystalline structure.

Answer 6

Minerals are natural and most are inorganic in origin. Plastic is an organic compound or mixture that is made artificially by man

Answer 7

In order to be a mineral, substances need to have fixed internal crystalline structure. Natural glass does not.

Answer 8

Glass does not have a crystalline structure, a trait necessary for definition as a mineral.

Answer 9

Because Glass doesn't have a crystal structure.