rock collecting

Polk pens new lapidary guide

Rocks, gems and minerals are more than simply topics covered in science classes, they are part of an expanding collecting interest, explored by esteemed agate collector Patti Polk, in the new edition of her book, "Collecting Rocks, Gems & Minerals."

Introduction to collecting rocks and minerals

Why do people collect rocks and minerals? There are as many reasons to collect them as there are types of collectors: for their beauty or rarity, for their monetary value, for lapidary or jewelry-making uses, metaphysical purposes, for scientific study, and for fun.

Defining rocks and minerals

What are rocks and minerals, and what is the difference between the two? A mineral, by definition, is any naturally occurring inorganic substance generally characterized by a definitive crystal structure that is classified according to the way the atoms of the mineral are arranged.