Commodity Code

amethyst

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

definition Amethyst is a violet variety of quartz often used in jewelry. more like this
notation
01.03.25.01 more like this
Amt more like this
source http://en.wikipedia.org/wiki/Amethyst more like this
type
Resource
Concept
broader quartz gemstone
narrower amethyst
in scheme commodity code
is primary topic of amethyst