The stem and bowl are connected with a bamboo tenon. Bamboo works well for tenons because they can be made to have thin walls, allowing for smaller diameter stems which are more aesthetically pleasing on most of my designs. The strength of bamboo cane can be attributed to the internal fibers that run lengthwise; and I believe they are more suitable than more modern plastic or metal tenons. They have the same physical properties as the bamboo stem; if the stem were to expand or contract with changes in the environment the tenon would similarly move with it, reducing the chances of a weakened glue bond or cracking of the stem.
A tagua nut (vegetable ivory) is held in the three jaw chuck and turned on the lathe into a stem accent piece. Blue coral is then inlaid into the vegetable ivory.
The stem accent is then glued into a mortise drilled into the end of the stem. Fitting small accents like this with a proper mortise and tenon joint is important to creating a long lasting pipe. Sometimes the hidden details make all the difference.