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The scientific definition of a "crystal" is based on the microscopic arrangement of atoms inside it, called the crystal structure. A crystal is a solid where the atoms form a periodic arrangement. (Quasicrystals are an exception, see below). Not all solids are crystals.

Check out our extensive guide to crystal meanings & stone properties with beautiful pictures. Find the right crystal or stone for you by learning their healing powers.

Read in-depth descriptions, planets, zodiacs, healing properties and more with each crystal. Detailed crystal properties.

A crystal is a solid material in which atoms, ions, or molecules are arranged in a highly ordered and repeating three-dimensional pattern, known as a crystal lattice.

Crystal, any solid material in which the component atoms are arranged in a definite pattern and whose surface regularity reflects its internal symmetry. Crystals are classified in general categories, such as insulators, metals, semiconductors, and molecular solids.

The Crystal Encyclopedia is the definitive guide to crystals, stones, and minerals. Find everything you've ever wanted to know about crystals!

What is a Crystal? Learn the scientific definition of crystal used by gemologists and answer some basic questions about what is and is not a crystal.

The meaning of CRYSTAL is quartz that is transparent or nearly so and that is either colorless or only slightly tinged. How to use crystal in a sentence.