Commodity Code

perlite

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

definition Perlite' is a volcanic glass with sufficient water content to cause it to expand, or froth up, when heated, forming a lightweight granular aggregate; used in construction, insulation, packaging and agriculture more like this
notation
01.01.04.04 more like this
Perl more like this
source This vocabulary more like this
type
Resource
Concept
broader industrial rock
narrower perlite
in scheme commodity code
is primary topic of perlite