mica. magnetite. hornblende. quartz.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: A student is trying to identify a mineral that has a nonmetallic luster and is black. It can also be scratched with a fingernail. According to the mineral reference sheet, the unidentified mineral is most likely
Possibilities:
- mica.
- magnetite.
- hornblende.
- quartz.

mica.