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

Home » Minerals » What is a Mineral? What are Minerals? Minerals are the foundation of the construction, manufacturing and agricultural industries. Article by: Hobart M. King, PhD Mineral …

Calcite is the principal constituent of limestone and marble. These rocks are extremely common and make up a significant portion of Earth's crust. They serve as one of the largest carbon repositories on …

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Associated minerals include: smithsonite, sphalerite, cerussite, anglesite, and galena. Diagnostic properties in hand specimens are its crystal habit, hardness, specific gravity, and its effervescence …

Garnet Physical and Chemical Properties The most commonly encountered minerals in the garnet group include almandine, pyrope, spessartine, andradite, grossular, and uvarovite. They all have a vitreous …

What is Pyrite? Pyrite is a brass-yellow mineral with a bright metallic luster. It has a chemical composition of iron sulfide (FeS 2) and is the most common sulfide mineral. It forms at high and low …

Luster is a physical property that can be helpful in mineral and gem identification. It can also determine how a mineral or gem can be used.

The Most Abundant Minerals in Earth's Crust: Known as the "common rock-forming minerals", they are minerals present at the time of a rock's formation and are important minerals in determining the …

Galena is a lead sulfide mineral. It is the world's most important ore of lead and a significant ore of silver.