The Adventures of a Rock At the dawn
of time, the Earth was a giant sphere filled with volcanic
activity. One day, some lava cooled and formed a rock called
granite. The granite was made up of 3 minerals known as quartz,
biotite mica, and feldspar. The dominant mineral was feldspar.
Feldspar‘s chemical composition was KAISi3O8. It contains 3 silicon
atoms and 8 oxygen atoms, making it part of the silicate group. It
was semi-hard and had a hardness of six on ...
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