<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">chrysocolla</topic></authority><related type="other"><topic>chrysocolla</topic></related><related type="broader"><topic>inorganic green pigment</topic></related><variant type="other"><topic>cedar green</topic></variant> <note xml:lang="en"><![CDATA[ A bluish green pigment derived from chrysocolla mineral, often containing free silica and other impurities. The translucent to opaque stone is typically sky-blue in color in its natural state, but appears green when ground into a fine powder. In the 16th and 17th centuries, it was used as a watercolor pigment called cedar green. It is stable to light but is decomposed by acids, alkalis, and heat.  ]]></note></mads>