Historical Statistics for Mineral and Material Commodities in the United States: By Thomas D. Kelly and Grecia R. Matos, with major contributions provided by ...

Detailed description, properties, and locality information guide about the mineral gypsum (selenite).

Moh's scale of mineral hardness is named after the scientist, Friedrich Mohs, who invented a scale of hardness based on the ability of one mineral to scratch another.

We have a variety of rock and mineral collections in boxed display trays. These specimens may be removed from the trays for handson examination and study.

How is Granite formed from Magma? What are the Uses of Granite?

The is a great mineral collection for classroom use or personal study. Includes specimens of 36 different minerals such as calcite, augite, gypsum, hornblende, quartz ...

Talc is known for being the softest mineral on earth. It is number 1 on the Mohs hardness scale, and can be easily scratched by a fingernail. Talc is not commonly ...

Birnessite Buserite. Comments: Round, "rabbit pellets" of buserite which dehydrates to birnessite when dry. Image photographed through water which is needed to ...

Photos and information about 80 common rockforming, ore and gemstone minerals from around the world.

Hardness: Mineral: Associations and Uses: 1: Talc: Talcum powder. 2: Gypsum: Plaster of paris. Gypsum is formed when seawater evaporates from the Earth's surface.

Mineral Hardness . The hardness of a mineral is a way of describing how easy or difficult it is to scratch the mineral. It is used, in combination with the other ...

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