A gem is almost always harder than the ore from which it came.
Diamond is a mineral and a gem. The main ore of diamond is called kimberlite.
No, it is a gem.
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Pegmatites.
No it is an ore like gold. Silver comes out of a mine.
Igneous Intrusions
It is a very common igneous rock.
Diamond is a special molecular arrangement of carbon, a mineral.
Diamond is a special molecular arrangement of carbon, a mineral.
Diamond is a special molecular arrangement of carbon, a mineral.