Today I Learned: "The Bruyere wood is very heat-resistant due to its silica content and is therefore well suited for the production of tobacco pipes. ( 17% silica, 33% lime, 11% potash and 6% magnesium ) "
Source: Pfeifendrechsler - http://www.hans-von-der-au.de/cms2/index.php?option=com_content&view=article&id=73&Itemid=123
Source: Pfeifendrechsler - http://www.hans-von-der-au.de/cms2/index.php?option=com_content&view=article&id=73&Itemid=123