The Caduceus and the Green Cross are some of the most pervasive symbols of pharmacology .
The mortar and pestle , along with the Caduceus , the Green Cross , and others , is one of the most pervasive symbols of pharmacology due to its classical use in medicine.www.rpsgb.org.uk/pdfs/mussheet13.pdf For pharmaceutical use , the mortar and the head of the pestle are usually made of porcelain , while the handle of the pestle is made of wood .
Mortar and pestle