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How can I tell what´s a rock and what´s a mineral?

Mineral or Rock?

Rocks are defined as aggregates of minerals - in other words, it's the little bits of minerals, stuck together, that make a rock. The tricky part is that sometimes you can't see the individual minerals, and you might think you're looking at one big mineral instead of lots of little ones stuck together.

Although this won't always be true, as a good rule of thumb, if you find a specimen larger than an inch or so, it's probably a rock rather than a mineral.

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