Question

which is not a requirement for matter to be classified as a mineral? solid organic crystalline naturally occurring

Explanation:

A mineral is a naturally - occurring, inorganic, solid, crystalline substance. The key points here are:

• Minerals are solid.
• Minerals have a crystalline structure.
• Minerals are naturally occurring.
• However, minerals are inorganic, so being organic is not a requirement.

Answer:

organic