Marble
Diamond
Talc
Quartz
Answer is Wrong!
Answer is Right!
The softest rock is talc. It is a mineral that is composed of magnesium, silicon, and oxygen. It is a very soft mineral and can be scratched with a fingernail. It is also a very slippery mineral and is often used in talcum powder.
Marble is a metamorphic rock that is composed of calcium carbonate. It is a
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