Quartzite VS Silica VS Silicon Dioxide

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Quartzite is a natural rock form, while silicon dioxide is a white powder, and silica is synonymous with silicon dioxide. The discussion raises questions about the nature and composition of various rocks, with some participants expressing skepticism about the natural origin of certain stones due to their shapes. The conversation also explores methods for crushing rocks into powder, including the necessary equipment and potential chemical additives. It is noted that smooth stone forms can result from natural erosion processes. Understanding the differences between these materials is essential for accurate identification and processing.
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Are they the same?

Quartzite is found in the nature as the rock form.

The colors are, some light brown, and some transparent.

Silicon dioxide is a powder, its color is white.

What is a silica?

Is there available a picture/image of a silica?

I have a mix of rocks such as below image:

Stones

What kind of rocks are they?

She says it was found in the nature.

I doubt it because the shape, like was shaped by the hand.

It like a synthesis then shaped by the hand.

What is the chemical composition?

I will crush them using the stone crusher machine.

I doubt the form will be a powder instead of more rough than a powder.

How do I make it to be a powder?

How many times to be crushed so that the form will be a powder?

What equipment do I need to make it as a powder?

Or what chemical additive to be used to make it as a powder?

Thank you
 
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