<?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">gold ruby glass</topic></authority><related type="broader"><topic>ruby glass</topic></related><variant type="other"><topic>glass, gold ruby</topic></variant><variant type="other"><topic>goldrubinglas</topic></variant><variant type="other"><topic>rubinglas</topic></variant><variant type="other"><topic>ruby glass, gold</topic></variant> <note xml:lang="en"><![CDATA[ Glass of a deep red color that is produced by a colloidal gold solution prepared by dissolving gold in aqua regia, sometimes including some tin or silver salts. Gold ruby glass was made by the ancient Egyptians and Romans; the ancient technique was lost until rediscovered in 17th-century Germany. Gold was also thought to be anti-toxic and to protect from poison anyone who drank from it.  ]]></note></mads>