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minerals don't break other minerals yet they can scratch other minerals based on their hardness which is measured by the Mohs scale
Minerals don't break down when cooked because they are at their most integral form. Only at extremely high temperatures will minerals break down.
That is referred to as fracturing.
Cleavage
cleavege of the mineral
To glide over (a series of a note) smoothly without a break
HARDNESS
fracture
i dont wnow
Hematite
One Way To Do This Is To Melt The Minerals In Huge Smelting Ovens. Another Method Is To Use Chemicals To Break Apart The Minerals.
Fracture - Property of minerals that break with jagged surfaces and edges.