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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 original
Concept original
broader
http://resource.geosciml.org/classifier/cgi/commodity-code/gemstones original
narrower diamond-gemstone original
in scheme commodity-code original
is primary topic of diamond-gemstone