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.

Mohs Hardness Scale: Testing the Resistance to Being Scratched
A list of minerals in order of hardness can be a handy reference. If you determine that a specimen has a hardness of Mohs 4, you can quickly get a list of potential minerals.

Copper 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 Geology.com Store.

Rock and Mineral Books - Geology.com
Information on over 500 minerals, complete with detailed color photographs, crystallographic diagrams, physical and chemical properties, and much more. More information, table of contents.

Rocks: Pictures of Igneous, Metamorphic and Sedimentary Rocks
Fluorescent Minerals Fluorescent Minerals and rocks glow with spectacular colors under ultraviolet light.

Magnetite & Lodestone | Mineral Photos, Uses, Properties
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 Geology.com Store.

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 Geology.com Store.

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