Commodity Code

diamond-gemstone

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

definition Diamond is the ultimate gemstone, having few weaknesses and many strengths. It is well known that Diamond is the hardest substance found in nature, but few people realize that Diamond is four times harder than the next hardest natural mineral, corundum (sapphire and ruby). But even as hard as it is, it is not impervious. Diamond has four directions of cleavage, meaning that if it receives a sharp blow in one of these directions it can cleave, or split. more like this
notation
01.03.08 more like this
DiamGe more like this
source http://www.galleries.com/Diamond more like this
type
Resource
Concept
broader gemstones
narrower diamond gemstone
in scheme commodity code
is primary topic of diamond gemstone