u/Born_Support_5279

Hardness below 5, no information about the origin, probably calcite? Confirm if you are more sure

Hardness 6-7, no information about the origin. Quartz??

Hardness about 3 or 4, no information about where it comes from

Hardness about 4, no information about where it comes from

I think hardness is about 4 or 5, bought from someone who doesn't really know minerals well so no hints.