[Jewelry making - Article 00261] - Re: [Orchid] Realistic rocks drilling

[John Donivan]

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    Haven't pitched in on this - it's a perennial question ;} There is
    another alternative, which is the old fashioned way. I guess carbide
    is going to do the job, but I'd consider that risky due to vibration
    on a nice piece of stone. And diamond is expensive. You can make your
    own core drills, though. Get brass or steel tubing of the right size,
    solder an end on it and a mandrel, which obviously needs to be on
    center, and then you can use carborundum or diamond grit and drill
    away... Not as easy as buying one, but much cheaper... 

http://www.donivanandmaggiora.com
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