The term "crystals" can refer to several different concepts depending on the context. Here are the main meanings: 1. **Physical Crystals**: In geology and chemistry, crystals are solid materials whose atoms are arranged in highly ordered, repeating patterns. This orderly structure leads to the formation of distinct geometric shapes. Common examples include salt (sodium chloride), quartz, and diamonds. Crystals can form through processes such as cooling magma, evaporating water, or precipitating from solutions.
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