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John Betts - Fine Minerals, New York, NY Dealers of Fine Minerals and Natural Crystal Clusters since 1989. Journal of weekly news and commentaries about rocks and ...

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Dictionnaire méthodique de l'architecture grecque et ...

Auteur : René Ginouvès, Roland Martin Titre : Dictionnaire méthodique de l'architecture grecque et romaine. Tome I. Matériaux, techniques de construction ...

Mineral - Wikipedia

A mineral is a naturally occurring chemical compound, usually of crystalline form and abiogenic in origin. A mineral has one specific chemical composition, whereas a ...

Q - Gems and Semi-precious Stones - British Columbia

Simandl, G.J., Paradis, S. and Birkett, T. (1999): Colombia-type Emeralds; in Selected British Columbia Mineral Deposit Profiles, Volume 3, Industrial Minerals, G.J ...

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The GEOGRAM (ISSN 0013-676X) is published once or twice a year by the New York State Geological Survey, New York State Museum. Issue No. 1, published every year ...

Minerals and Africa's Development

Minerals and Africa's Development The International Study Group Report on Africa's Mineral Regimes Economic Commission for Africa African Union

Minerals - Arkansas

In the bauxite refining process, the aluminum-bearing minerals in bauxite are converted in a multiple-step process to alumina (Al2O3). Alumina can be smelted to form ...

Carbon Dioxide Reforming of Methane To Produce .

Carbon Dioxide Reforming of Methane To Produce Synthesis Gas over Metal-Supported Catalysts: State of the Art

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Gemewizard software tool for jeweler, gem dealer, diamond dealer and appraiser. Handling gems and diamonds and powerful, color communication tool, giving you access ...

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Silver: The mineral native Silver information and pictures

Detailed description, properties, and locality information guide about the precious metal mineral native silver.

Zinc - Wikipedia

Zinc is a chemical element with symbol Zn and atomic number 30. It is the first element in group 12 of the periodic table. In some respects zinc is chemically similar ...

Beaumont Tiles: Types of Tiles

Beaumont Tiles guides you through the different types of tiles, and the ways a tile can be used.