Your basic need to know about Ores! Here is the definition of Ore(s) Mineral from which metal is extracted: a naturally occurring mineral from which constituents, especially metals, can be profitably extracted
synonyms: mineral · rock · metal · element · aggregate · raw material
It is not a rock, but It's the first thing you need to start with to mine ores!
How-to-guide for stone: First, collect Any smout of Stone, to make tools, Go to crafting (C key) and Click on Materials > Tools > Small Stone and click it 3 times.
More will be added later.