<?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">opal glass</dc:title><dc:identifier>http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31375215</dc:identifier><dc:language>en</dc:language><dc:publisher xml:lang="en">Getty Institute</dc:publisher><dcterms:created>2026-03-30 20:41:11</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">glass, opal</dcterms:alternative> <dcterms:alternative xml:lang="en">opalescent glass</dcterms:alternative> <dcterms:alternative xml:lang="en">opaline</dcterms:alternative> <dcterms:alternative xml:lang="en">opaline glass</dcterms:alternative> <dc:description xml:lang="en"><![CDATA[ Bluish white, fiery, opalescent, translucent glass that has been made white by the addition of calcium phosphate (bone ash) and opalescent by the addition of fluorides (fluorspar, cryolite, or lepidolite) and/or arsenic. Red tones appear in transmitted light. Opal glass was used for windows, bowls, light shades, table tops, and cosmetic jars.  ]]></dc:description></metadata>