Graphite has the same composition as diamond, the hardest mineral known, but its unique structure makes it extremely light, soft, inert and highly resistant to heat.
All You Must Know About The Location And Properties Of Graphite
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Graphite: Mineral Information, Data And
Graphite: A mineral with extreme properties and many uses
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Graphite - Wikipedia
Graphite: The mineral Graphite information and pictures
Graphite: Mineral Information, Data And
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Graphite - the Writing Stone
Graphite (C) - Classifications, Properties & Applications
Graphite: Mineral Information, Data And
Epidotic alteration on a gneiss boulder.