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balo_niki

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Feldspars are hard minerals, every one of them with a hardness of 6 on the Mohs scale. This lies between the hardness of a steel blade (5.5) and the hardness of quartz. – PowerPoint PPT presentation

Number of Views:7
Date added: 16 February 2022
Updated: 18 February 2022
Slides: 9
Provided by: balo_niki

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