<?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>mineral</topic></related><variant type="other"><topic>gold solder</topic></variant><variant type="other"><topic>gold-solder</topic></variant> <note xml:lang="en"><![CDATA[ A hydrous silicate of copper having a green or sky-blue, a shining luster, often opal-like in texture, and used as a gemstone. It has been gathered or mined as a semiprecious stone since 3000 BCE. The translucent to opaque stone is typically greenish or sky-blue in its natural state, but appears true green when ground into a fine powder, which is used as a pigment. ]]></note></mads>