2007-10-09 08:47:29 · 4 answers · asked by JoAnna 2 in Science & Mathematics ➔ Earth Sciences & Geology
Because, technically, obsidian is amorphous. In other words, it lacks a uniform cellular structure. Minerals, by definition, must have a solid crystalline structure.
2007-10-09 08:54:17 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Is Obsidian A Mineral
2016-11-01 06:39:58 · answer #2 · answered by blanga 4 · 0⤊ 0⤋
The basic definition of a mineral is "a natural, inorganic, crystalline substance."
Obsidian is glass, it is natural and inorganic, but it is amorphous and not crystalline. Therefore it fails one of the 3 key criteria to make it a mineral.
Hope that helps!
2007-10-09 08:52:12 · answer #3 · answered by minefinder 7 · 4⤊ 0⤋
It does not have a crystalline structure.
2007-10-09 11:31:12 · answer #4 · answered by Wayner 7 · 0⤊ 0⤋