The mineral is hard compared to most of the objects it would be used to abrade. On the Mohs Scale of relative mineral hardness it's a seven with ten being the hardest.
It is not widely used as an abrasive because quartz has a high silica content. Silica, in its natural form, is a potential health hazard (silicosis) when ingested through the lungs. Therefore, it is not frequently used as an abrasive in abrasive blasting applications.
Useful: Energy Light Sound Non-Useful: Electricity C02
it is useful for idiots
This property can be useful in containing substances, like if you want to contain liquid nitrogen you would use an iron container (or practically any other element because nitrogen is almost inert) because the two elements don't interact with each other.
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Silence is most useful when broken.
Pieces of quartz free on the surface and not in the bed rock, as it has eroded from the a quartz vein and rolled and or washed to its current location.
When quartz reacts with acid, it does not dissolve or react chemically. Quartz is a chemically inert mineral and is resistant to acids, including both weak and strong acids. This property makes quartz a useful material for various industrial applications.
Sandpaper is high in friction but is not considered useful in terms of being helpful in a general sense.
While quartz itself doesn't have magnetic properties to make a compass, you could use a small piece of quartz as a reference point for direction when building a simple compass. By aligning the quartz with the Earth's magnetic field, you could use it as a marker to determine north and orient your compass accordingly.
Quartz is a natural substance, SiO2, and has a number of properties useful to us. It has a high melting point compared to ordinary glass, it has some very useful piezoelectric properties, It has a high propensity to crystallize when in compound with other substances. Hence many of our precious jewels.
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Limestone is the rock that is most useful to modern industrial countries because it is the source for the main ingredient in cement.
Cobalt is a useful ingredient in certain types of steel.
Density is the least useful property for identification because different specimens of the same type of mineral can vary in size. -Color is the least useful property for identification because it is the most obvious property.
If it is a guard dog it guards property, that is useful.
This depends on your needs !
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