Mineral - Wikipedia
Georgius Agricola 's classification of minerals in his book De Natura Fossilium, published in 1546, divided minerals into three types of substance: simple (stones, earths, metals, and congealed juices), compound (intimately mixed) and composite (separable).

Minerals | An Open Access Journal from MDPI
Minerals is an international, peer-reviewed, open access journal of natural mineral systems, mineral resources, mining, and mineral processing, and is published monthly online by MDPI.

Mineral | Types & Uses | Britannica
Nearly all minerals have the internal ordered arrangement of atoms and ions that is the defining characteristic of crystalline solids. Under favourable conditions, minerals may grow as well-formed crystals, characterized by their smooth plane surfaces and regular geometric forms.

Minerals - Geology (U.S. National Park Service)
Many minerals are coveted around the world for their striking beauty, rarity, and gem quality. But what is a mineral? Minerals are formed naturally by geological processes. A mineral is a homogeneous solid that can be made of single native element or more usually a compound.

What Is a Mineral? Definition and Examples
Minerals include elements that occur in relatively pure form as solids in nature (native elements) and compounds. However, unlike most compounds in chemistry, minerals often contain two or more elements that occupy the same positions in a mineral’s crystal structure.

Minerals 101 | U.S. Geological Survey - USGS.gov
Want to know more about minerals? Minerals contribute to industry, national security, and the economy. Keep reading to learn what minerals are and how the USGS studies them.

Mineral Identification: Properties, Formation & Uses
Minerals are the building blocks of rocks, which are made up of one or more minerals. They are typically formed through various geological processes, such as crystallization from a melt (igneous), precipitation from a solution (sedimentary), or metamorphism (metamorphic).

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

Mineral - Simple English Wikipedia, the free encyclopedia
Minerals are substances that are formed naturally in the Earth. Minerals vary in composition, from pure elements and simple salts to very complex silicates with thousands of known forms.