A hard mineral commonly used in clocks is quartz. Quartz is a crystalline form of silicon dioxide and is prized for its piezoelectric properties, which allow it to generate an electric charge when subjected to mechanical stress. This characteristic is utilized in quartz crystal oscillators, providing precise timekeeping in clocks and watches. Its durability and abundance make it an ideal choice for this application.
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Quartz is the mineral commonly used to keep accurate time, particularly in quartz clocks and watches. Its piezoelectric properties allow it to generate a consistent frequency when an electric current is applied, enabling precise timekeeping. This reliability has made quartz the standard for many timekeeping devices.
The atom of the isotope caesium 133; the definition of second in SI is based on this atom.
Magnets for suspension springs for clocks
This mineral is hydroxyapatite.
slate
Corundum - Crystalline Aluminium Oxide (Al2O3) is a mineral that is hard (9.0 on Mohs scale) and used as an abrasive.
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The most common mineral which is used in laundry detergent are phosphates. This is used in detergents to remove hard water minerals in clothing.
There is insufficient information to answer this question. What mineral? Also, it seems hard to imagine that only one explorer used a given mineral to find his/her way.
The Romans did not have clocks. They used sundials
I think all egyptians used water clocks.
Clocks are primarily used for timekeeping purposes in America.
Diamond is a very hard white mineral.