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 …

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Mar 28, 2020 · 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.

Apr 9, 2026 · 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 …

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Dec 19, 2024 · 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.

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Apr 17, 2026 · The most interesting crystal structures are those of elements that are neither metallic, covalent, nor diatomic. Although boron (B) and sulfur (S) have several different crystal structures, …