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moss agate

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

definition Moss agate (also called mocha stone) is a semi-precious gemstone formed from silicon dioxide. It is a form of chalcedony which includes minerals of a green colour embedded in the stone, forming filaments and other patterns suggestive of moss. It also sometimes resembles blue-cheese. The field is a clear or milky-white quartz, and the included minerals are mainly oxides of manganese or iron. It is not a true form of agate, as it lacks agate's defining feature of concentric banding. Moss agate is of the white variety with green inclusions that resemble moss. more like this
notation
01.03.29.01.01.01 more like this
Magg more like this
source http://en.wikipedia.org/wiki/Moss_agate more like this
type
Resource original
Concept original
broader
http://resource.geosciml.org/classifier/cgi/commodity-code/agate original
narrower moss-agate original
in scheme commodity-code original
is primary topic of moss-agate