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  1. Mineral Properties, Photos, Uses and Descriptions

    Photos and information about 80 common rock-forming, ore and gemstone minerals from around the world.

  2. What are Minerals? | What are Mineral Properties? - Geology.com

    There are approximately 4000 different minerals, and each of those minerals has a unique set of physical properties. These include: color, streak, hardness, luster, diaphaneity, specific gravity, …

  3. REE - Rare Earth Elements - Metals, Minerals, Mining, Uses

    Home » Metals » REE - Rare Earth Elements REE - Rare Earth Elements and their Uses The demand for rare earth elements has grown rapidly, but their occurrence in minable deposits is limited. Article …

  4. California Gemstones: Tourmaline, Garnet, Turquoise and More

    Southern California is one of the most important areas in the world for the production of gem-quality and specimen-quality tourmaline. Numerous mines over the past 100 years have also produced …

  5. Fluorescent Minerals and Rocks: They Glow under UV Light!

    A small number of minerals and rocks will glow with spectacular colors under ultraviolet light. Learn how this happens.

  6. Crystal Habits and Forms of Minerals and Gems - Geology.com

    The best way to learn about minerals is to study with a collection of small specimens that you can handle, examine, and observe their properties. Inexpensive mineral collections are available in the …

  7. Limestone: Rock Uses, Formation, Composition, Pictures

    All limestones contain at least a few percent other materials. These can be small particles of quartz, feldspar, or clay minerals delivered to the site by streams, currents and wave action. Particles of …

  8. Pyrite Mineral | Uses and Properties - Geology.com

    The best way to learn about minerals is to study with a collection of small specimens that you can handle, examine, and observe their properties. Inexpensive mineral collections are available in the …

  9. North Carolina Gemstones: ruby, sapphire, emeralds and gold

    Hunt For Gems - Keep What You Find! There are over 100 mines in the United States where anyone can visit, pay a small fee, look for gems and minerals, and keep what they find. For a large list of …

  10. Calcite Mineral | Uses and Properties - Geology.com

    The best way to learn about minerals is to study with a collection of small specimens that you can handle, examine, and observe their properties. Inexpensive mineral collections are available in the …