- Mineral Properties, Photos, Uses and Descriptions
Photos and information about 80 common rock-forming, ore and gemstone minerals from around the world
- 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, cleavage, fracture, magnetism, solubility, and many more
- What Are Rock-Forming Minerals? - Geology. com
What Are Rock-Forming Minerals? Scientists have identified over 4,000 different minerals A small group of these minerals make up almost 90% of the rocks of Earth’s crust These minerals are known as the common rock-forming minerals
- 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
- Rocks: Pictures of Igneous, Metamorphic and Sedimentary Rocks
Fluorescent Minerals Fluorescent Minerals and rocks glow with spectacular colors under ultraviolet light
- Is Water a Mineral? -- Is Ice a Mineral? - Geology. com
The best way to determine if water or ice are minerals is to compare their properties to the definition of the word mineral
- Luster: The light-reflecting qualities of a mineral.
This appearance often occurs on cleavage surfaces of transparent to translucent minerals that include some micas, some feldspars, and some carbonate minerals Examples include muscovite, orthoclase, and calcite
- 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 turquoise, garnet, morganite, aquamarine, topaz, kunzite, and many other gems
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