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Minerals in Earth Science
Understanding how minerals form, transform, and tell the story of Earth's geological processes.
How Minerals Form: Igneous, Sedimentary, and Metamorphic Origins
The complete story of mineral formation — from crystallization out of magma to precipitation from seawater and recrystallization under heat …
Mineral Deposits and Mining: From Ore to Metal
Types of ore deposits — hydrothermal, placer, pegmatite, and more — extraction methods, and notable mining regions around the world.
Gemstones: From Rough to Cut
What elevates a mineral to gemstone status, the 4 Cs grading system, famous gems and their sources, and how to …
Minerals Under the Microscope: Optical Mineralogy
How petrographic microscopes and polarized light reveal crystal properties — birefringence, pleochroism, extinction angles — that are invisible to the …
Economic Minerals: Industrial Uses You Never Knew
How minerals quietly underpin modern civilization — from the lithium in your phone to the fluorite in your eyeglass lenses …