commodity	chert
class_a	2.5e+08
class_b	5e+07
class_c	1e+07
class_d	2e+06
unit	t
name	Chert
description	Chert is a fine-grained silica-rich microcrystalline, cryptocrystalline or microfibrous sedimentary rock that may contain small fossils. It varies greatly in color (from white to black), but most often manifests as gray, brown, grayish brown and light green to rusty red; its color is an expression of trace elements present in the rock, and both red and green are most often related to traces of iron (in its oxidized and reduced forms respectively). - http://en.wikipedia.org/wiki/Chert
url	http://inspire.ec.europa.eu/codelist/CommodityCodeValue/chert
commoditygroup	specialtyAndOtherIndustrialRocksAndMinerals
red	161
green	156
blue	153
crm_2020	null
commoditygroup_e_myb	Aggregates and related materials
commodity_and_e_myb	Aggregates and related materials
subcommodity_and_e_myb	Chert
commodity_portal	Chert