Definition
A 'crystal' is a solid material whose atoms, molecules, or ions are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. 💎 Think of it like a perfectly organized Lego structure at the atomic level. It often exhibits distinct faces and shapes. Unlike amorphous solids (like glass), crystals have a defined melting point. It's found in many forms, like salt, sugar, and gemstones. It has unique optical and physical properties. It represents order and beauty in the natural world.