Home > Term: hardness plates
hardness plates
A series of small pieces of minerals of differing hardness, polished flat, and set side by side in cement, for testing hardness of another mineral, which is drawn across one piece after another, beginning with the hardest, until it scratches one.
- Kalbos dalis: noun
- Pramonės šaka / sritis: Mining
- Category: General mining; Mineral mining
- Government Agency: USBM
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- ed.young
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(Milwaukee, United States)