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468 search results for: brown crystals

463

Rock Crystal

Definition and formation Natural crystal is a crystalline body of the mineral Quartz, chemically composed of silica (SiO₂), which is formed through a long natural process under specific geological conditions. […]

464

Natural crystal

Definition and Formation Natural crystal refers to crystals that are formed through natural geological processes over long periods of time. They are typically composed of various chemical compounds, with silica […]