I have yet to try for myself. I have copied and pasted these helpful pointers from the blog
Materials Needed:
High speed rotary tool a large drill press or a dremel tool works well.
Pointed masonry drill bit or a hollow, diamond-tipped coring bit. For drilling holes in smaller stones used in jewelry, a 2.5mm diameter bit is a good size.
Plastic container to hold water so you can drill your stone under water. Drilling underwater cools off the bit and which will speed up your drilling and keep your stone from over heating.
Adjustable wrench to hold your rock in place while drilling.
Goggles
Small sedimentary rocks (sandstone, limestone, etc when scouring the beach for rocks, these tend to be well rounded)
1. Put on your goggles.
2. Using your wrench, firmly hold a rock inside your container, just beneath the water. Hold them steady.
3. Turn on the rotary tool and hold it perpendicular to the rock. Press firmly but gently. Do NOT rotate the hand holding the rock or else the rock will crack. The water will become cloudy, but that's fine. Continue to push firmly until the bit pokes through the other side.
High speed rotary tool a large drill press or a dremel tool works well.
Pointed masonry drill bit or a hollow, diamond-tipped coring bit. For drilling holes in smaller stones used in jewelry, a 2.5mm diameter bit is a good size.
Plastic container to hold water so you can drill your stone under water. Drilling underwater cools off the bit and which will speed up your drilling and keep your stone from over heating.
Adjustable wrench to hold your rock in place while drilling.
Goggles
Small sedimentary rocks (sandstone, limestone, etc when scouring the beach for rocks, these tend to be well rounded)
1. Put on your goggles.
2. Using your wrench, firmly hold a rock inside your container, just beneath the water. Hold them steady.
3. Turn on the rotary tool and hold it perpendicular to the rock. Press firmly but gently. Do NOT rotate the hand holding the rock or else the rock will crack. The water will become cloudy, but that's fine. Continue to push firmly until the bit pokes through the other side.
High speed rotary tool a large drill press or a dremel tool
A small (2mm diameter) and large (10mm) hollow,diamond-tipped coring bit.
Plastic container to hold water so you can drill your stone under water. Drilling underwater cools off the bit and which will speed up your drilling and keep your stone from over heating.
Adjustable wrench to hold your rock in place while drilling.
Goggles
Small sedimentary rocks (sandstone, limestone, etc when scouring the beach for rocks, these tend to be well rounded)
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