Rosewoods contain an extractive called dalbergione. It is known to be a powerful sensitizer with respect to causing allergies in some people. In my case, I worked with rosewood for three months and developed a rash like poison ivy that didn't go away until I stopped using rosewood- itching, bleeding, lost half the pigment on my chest- took years to get back to normal. If you have an allergy, the reactions can be very bad- I wouldn't take the chance. As a stem inlay, no problem...just don't use it in a tobacco chamber....