Does a crystal fall in the category of a rock?

or:Does a crystal fall in the category of a rock?or:A crystal is a form defined by the size and shape of its smallest unit. Steel has several crystal

or:Does a crystal fall in the category of a rock?

or:A crystal is a form defined by the size and shape of its smallest unit. Steel has several crystalline forms, depending on temper. But steel is not a rock. Aluminum can change into a crystalline form and lose all its strength just by being vibrated. But aluminum is not a rock. Quartz is such a versatile material that it can crystallize in the form of other rocks, and quartz is a rock. Your question does not have a straight answer, partly because \"crystal\" can mean so many things, and partly because \"rock\" is an uncertain category.

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