Commodity Code

sand

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

broader industrial material
narrower sand
sand and gravel
definition Industrial sand is a term normally applied to high purity silica sand products with closely controlled sizing. It is a more precise product than common concrete and asphalt gravels. Silica is the name given to a group of minerals composed solely of silicon and oxygen, the two most abundant elements in the earth’s crust. more like this
narrower foundry sand
broader sand
frac sand
broader sand
notation
01.01.06 more like this
Sand more like this
source http://www.sand.org/What-is-Industrial-Sand more like this
type
Resource
Concept
in scheme commodity code
is primary topic of sand