Help me please

[Kziggy]

Help me please identify this rock

I have this rock and I want to know what it is. I want to polish it and use it for jewelry if possible. Problem I am new to this and have no clue what this is nor how to polish it or if it can be polished. Any help would be greatly appreciated. Thank you

 

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[Eu_citzen]

Looks like quartz. Cutting and polishing is pretty straight forward. Use cerium oxide for polish.
A cabbing machine or similar would be easiest to use for cutting it.

But chances are you need a tilesaw or similar to cut up the quartz first.