<?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_es">cuarzo</topic></authority><related type="narrower"><topic>amatista</topic></related><related type="narrower"><topic>calcedonia</topic></related><related type="narrower"><topic>horsteno</topic></related><related type="narrower"><topic>cristal de cuarzo</topic></related><related type="narrower"><topic>venturina</topic></related><related type="narrower"><topic>cuarzo rosado</topic></related><related type="narrower"><topic>citrina</topic></related><related type="narrower"><topic>cristobalite (traducció pendent)</topic></related><related type="broader"><topic>mineral</topic></related><related type="broader"><topic>gemstones by specific type (traducció pendent)</topic></related><related type="broader"><topic>silicates (traducció pendent)</topic></related> <note xml:lang="es"><![CDATA[ La variedad de sílice más común. ]]></note></mads>