What is what does crystal mean?

Crystals are naturally occurring solid materials that are composed of an orderly and repeating pattern of atoms, molecules or ions. They can be found in various shapes and sizes and have distinct physical and chemical properties. Crystals are valued for both their decorative and healing properties, and are often used in jewelry, energy healing, and other spiritual practices. Some popular types of crystals include quartz, amethyst, and rose quartz. Crystals are also used in many industrial and technological applications, including electronics, optics, and medicine.