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Hipervinculo Geología

How to Grow Your Own Crystal Geodes

We offer you an interesting project for your children, and we know they will love it. How about growing your own Crystal Geodes? (Geodes are empty rocks on whose inner walls minerals form sometimes fi ...

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Hipervinculo Geología

Moh's Scale of Mineral Hardness Quiz

The Mohs scale of mineral hardness characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer material. It was created in 1812 by the German ...