Drilling in small stones

I’m just researching this and am coming up with drill bits that look like this.

They’re called stuff like “diamond drill bit” or “jewelry drill bit”.

I found this blog on how to make holes. They are showing a hollow “core bit”. That looks interesting.

I found some in ebay and have them on order now.

I will give them a try. I’ll drill under water for cooling. I guess I’ll make a little stone holder out of wood and then place stones in it then submerge and drill.

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