Clue: Mineral hardness scale inventor Friedrich
We have 1 answer for the crossword clue Mineral hardness scale inventor Friedrich.
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Related Clues:
- Friedrich known for a mineral hardness scale
- He assigned "1" to 77 Across
- Mineral hardness scale
- Scale in which diamond=10
- Talc-to-diamond scale
- ___ scale (hardness measure)
- ___ scale (mineral hardness measure)
- ___ scale (mineral hardness numbers)
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