Cheap way to grind stones without wasting much time?

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Hello,
 


I have around 10 Kgs in total of different stone ores like sulfur and quartz and stibnite that I need to grind to 1.5mm. 


However, I don't want to pay much and don't have so much free time to spend grinding. I tried to search for solutions online, but laboratories wanted a few hundred dollars and the guide I was given would require so much time on my part, and I don't
have much time

. So I was wondering if experts here can give me advice?



Thank you for your time