Gems are valuable rocks aren't.
Sand and gravels are naturally occurring, in pits, while crushed rock is a product of blasting and crushing rock, in a quarry.
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Ore is raw material, alloy is combination of metals
Yes! It is rock that is not ore, but surrounds the ore.
It is a difference between the hardness, generally expressed in the Mohs scale.
In English ores is the plural of ore. Ore is a mined substance which may be used directly or from which other minerals and elements can extracted.
Ore is rock from which a metal or valuable mineral can be extracted. Iron ore, copper ore are two examples.
Bauxite is the ore of aluminium, from which aluminium is is extracted.
Retrieve a pickaxe and press on a rock. You will commence mining if there is ore in the rock.
Slate is not an ore; it is a metamorphic rock.
Ore is the correct spelling.
the mining of ore is when you get ore from a rock you mine anywhere in runescape.