<?xml version="1.0" encoding="utf-8"?><metadata xmlns:dc="http://purl.org/dc/elements/1.1/"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dcterms="http://purl.org/dc/terms/"><dc:title xml:lang="en">noble metal</dc:title><dc:identifier>http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31375288</dc:identifier><dc:language>en</dc:language><dc:publisher xml:lang="en">Getty Institute</dc:publisher><dcterms:created>2026-03-30 20:41:12</dcterms:created><dcterms:isPartOf xsi:type="dcterms:URI">http://AATesaurus.cultura.gencat.cat/aat/getty_en</dcterms:isPartOf><dcterms:isPartOf xml:lang="en">Tesaurus d&apos;Art i Arquitectura</dcterms:isPartOf><dc:format>text/html</dc:format> <dcterms:alternative xml:lang="en">metal, noble</dcterms:alternative> <dcterms:alternative xml:lang="en">noble metals</dcterms:alternative> <dc:description xml:lang="en"><![CDATA[ Metal or alloy that is resistant to oxidation, corrosion, and dissolution by acids. Noble metals remain bright when heated in air. Examples of noble metals are gold, iridium, mercury, osmium, platinum, and ruthenium. In physics, noble metals are restricted to those having filled electronic d-bands: according to this definition in physics, only gold, silver, and copper are noble metals. Many noble metals are also precious metals, due to their rarity in the Earth's crust. ]]></dc:description></metadata>