Normally,though it does overlap,try to classify an artefact as follows:
01.Ritual object : used in religious ceremonies.
02.Symbols of Power: usual objects like Jade seals,spectres,etc.
03.Ornamental and Decorative artefacts: Jade necklaces,pectoral pendants,Jade vases etc.
This Jade Animal Head Tube posted is probably a composite of all three: a symbolic 'faucet' head used in a religious ceremony and is decorative!!!
Dated to the Zhou Dynasty,because there is a similar design ,but in ceramics(earthernware) and is 120.0cm(47 1/4") long,whereas this is only 5.5cm(2 1/8") long.
An interesting artefact for evaluation and research. Visit the Friends of Jade website to know more about Jade.