Graphite

Types and varieties. The principal types of natural graphite, each occurring in different types of ore deposits, are Crystalline small flakes of graphite (or flake graphite) occurs as isolated, flat, plate like particles with hexagonal edges if unbroken.

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Platinum The chemical element, its science, properties

A column of platinum the size of a man is about 25 times heavier (it weighs an amazing 2000kg or 4,400lb) Platinum is a dense, expensive, and relatively rare, silvery white metaland those may be the only things you know about it.

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