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Is my specimen a rock or a mineral?
The
difference between rocks and minerals is that
bits of mineral make up rocks, whereas
minerals are pure crystals made up of specific
types of atom. Minerals sometimes grow into
specific crystal shapes whereas rocks are
usually just 'blob' shaped. It can be
difficult to tell rocks and minerals apart
sometimes, so if you can't decide what your
specimen is using these keys then take it to a
museum to be identified, or use the
Virtual
Store
which features lots of different rocks
and minerals.
Does your
specimen have a definite shape and look like a
crystal?
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