Sand is mainly made of rocks and mineral
grains. The main component of sand in inland
and non-tropical coastal settings is silicon
dioxide in the form of quartz. The composition
or sand varies depending on the local rock sources
and conditions. The second most common type of
sand is calcium carbonate.
is a nice video that shows and speaks about what
sand is made of.
You can also visit the following links and
enjoy more about sand.
sand made of
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