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Hardness. a measure of how easily a mineral can be scratched. Any mineral with a greater hardness than another mineral will scratch that softer mineral. cleavage. the ability of a mineral to split relatively easily and evenly along one or more flat planes. Fracture.
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Hardness • a measure of how easily a mineral can be scratched. • Any mineral with a greater hardness than another mineral will scratch that softer mineral
cleavage • the ability of a mineral to split relatively easily and evenly along one or more flat planes.
Fracture • is the ability of minerals to break with arc like, rough, or jagged edges.
Ore • mineral that contains a useful substance that can be mined at a profit.
Gem • valuable minerals that are prized for their rarity and beauty.