Which is the best wood for jewelry?

If you're speakign of the ear plugs (gauged earrings), then most types of non-pressure treated woods will do fine. Preassure treated wood (the most common pine woods at lumber stores) are treated to resis rot and bugs with arsenic. Arsenic is a poison and shouldn't be trusted so close to your skin.

Non- treated woods are fine. Domestic and exotic, soft and hard woods should be safe for use. Some things to take note of:

• Anyone can have Allergies to anything, including woods. Test a small area or talk to your doctor about potential issues.
• Some exotic woods have urushiol- the irritant in poison ivy/oak/sumac. Talk to suppliers befor using these woods.
• If you are making your own, use only dried woods- those right off the tree will shrink or crack as the moisture escapes over time. Most woods purchased in stores are already prepared and good to use.

If you are not wearing them in constant contact with your skin, there should be little worry about the pressure treated woods.