i thought they were made of copper and zinc
and it's are pennies made out of mica schist not is
Maybe? Maybe not. The only one that knows is God.
No. Mica schist is a schist with a preponderance of mica minerals. There are also chlorite schists, talc schist, and so on.
Schist has A LOT of mica in it
Mica schist is a metamorphic rock with a predominance of micaceous minerals.
For construction
Yes. Mica minerals are silicates.
Shale.
foliated
Mica schist is primarily composed of mica, whereas aventurine - note the spelling- is composed of quartz with abundant inclusions of mica. This makes for a relatively hard, tough and attractive material that can be polished into jewelry and many other items.
Granite and Mica Schist.
It is a folliated metamorphic rock.
quartz or mica
Muscovite