Daily Wire Tip Nov. 23: Drilling Holes in Gemstones
Daily Wire Jewelry Making Tip
November 23, 2009
Question:
My husband is interested in drilling holes in gemstone beads or slabs that don’t have one yet. What’s the best way to go about it? What tools will we need?
Answer:
Each lapidary has their favorite tools and procedures for drilling holes in rock material; the following is how we drill holes in slabs in my studio.
We took a round cake pan and cut a piece of wood the same size. We put the wood in the bottom of the pan and filled it about 1/3 of the way with water. (It is imperative that rock be drilled in water to flush out the rock ‘mud’ as it grinds away and to keep both the material and drill bit cool.) This pan is then placed under a hand-operated drill press fitted with a diamond bit. (Choose a sintered bit that has diamond impregnated throughout the bit whereas a plated bit just has diamond around the outside edges and will wear out very quickly.) Using a constant up and down motion, the drill is continuously and evenly pressed against and into the rock, until a hole goes through it. Depending on both the hardness of the material being drilled and the desired depth of the hole, be prepared to go through several diamond bits before the hole is finished. (We have our dentist save his ‘used’ diamond drill bits for us as they usually have lots of use left when he is ready to discard them.)
Answer contributed by Dale “Cougar” Armstrong
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Filed under:Daily Wire Jewelry Tips‚ Jewelry Tool Tips‚ Light Lapidary‚ Project Help‚ Technique Tips
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for wire bracelets I have trouble with the small wires at beginning and ending of the wrap coming undone after wear. Do you have hint on how to prevent this?
For Melanie, most of the folks who come to me with this particular challenge are using half-round wire to make their wraps with. Try changing to square, half-hard as a bracelet is in a high traffic area and needs the strength of the square, half-hard. Rarely do I or my students use a half-round wire to make bracelet wraps and when we do, it’s a 16 or 18 gauge, with half-hard temper.
Dale/Cgr
I remember when we did some sodalite beads and drilled them out for beads. It was really time consuming and was really satisfactory in the end when I was able to tell customers that these were beads we had made, only problem was that when we calculated out cost they came out to about a dollar per bead and that was twenty years ago.
Doing it for your own satisfaction is great, but if you intend to do it commercially, make sure you have a venue that will be able to meet your price point. A lot of us get into this business for love of the art and materials; reality though states we need to make a buck.
Word of Warning: make sure you wear a dust mask and safety glasses when you are drilling, if your material shatters you definitely need that protection. Equally important to know when working rock like malachite, turquoise, azurite and other copper minerals, is that their dusts are toxic if inhaled. (All it takes is a moment).
Be safe and have fun
J
Now that’s a great tip to pass on to the husband so he can drill some things for me. Thanks Dale!