Commodity Code

tourmaline

http://resource.geosciml.org/classifier/cgi/commodity-code/tourmaline

definition Tourmaline is a crystal boron silicate mineral compounded with elements such as aluminium, iron, magnesium, sodium, lithium, or potassium. Tourmaline is classified as a semi-precious stone and the gemstone comes in a wide variety of colors. more like this
notation
01.03.36 more like this
To more like this
source http://en.wikipedia.org/wiki/Tourmaline more like this
type
Resource
Concept
broader gemstones
narrower tourmaline
in scheme commodity code
is primary topic of tourmaline