Ok this is where I read this. meerschaumstore.com. Here is the article. http://www.meerschaumstore.com/lopedia.htm
Nearly 300 years ago, the first meerschaum pipe was carved by hand. And today, these unique pipes are still carved by hand. The carver, a craftsman of unique ability and long experience, examines each piece of meerschaum, calculating the lines of cleavage along which it should be split. The split block-meerschaum is soaked in water for 15-30 minutes until the material achieves a cheese-like consistency. Working with the softened material, the carver determines the rough shape of the pipe before the bowl and draft hole are bored. Like all fine hand-crafted articles, no two meerschaums are alike. The carved meerschaum goes into a kiln at high temperature, a process that removes all moisture from the mineral. The shank is threaded and fitted with a stem. After meticulous polishing with the finest grade abrasives, the meerschaum is ready for waxing. Though there are many different wax formulas, beeswax alone yields the rich coloring associated with the finest meerschaums. Melted and then bleached, the beeswax is ready to receive the pipe itself. The subtle differences in color and tone among pipes are intentional, achieved by careful dipping of the pipes a specific number of times.