Commodity Code

chalcedony

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

unstar this property definition Chalcedony is a cryptocrystalline form of silica, composed of very fine intergrowths of the minerals quartz and moganite. more like this
star this property narrower agate
star this property broader chalcedony
carnelian
star this property broader chalcedony
chrysoprase
star this property broader chalcedony
star this property notation
01.03.29.01 more like this
Chlce more like this
star this property source http://en.wikipedia.org/wiki/Chalcedony more like this
star this property type
Resource
Concept
star this property broader silica gemstone
star this property narrower chalcedony
star this property in scheme commodity code
star this property is primary topic of chalcedony& properties=definition