<?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">ultramarine blue</dc:title><dc:identifier>http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31437270</dc:identifier><dc:language>en</dc:language><dc:publisher xml:lang="en">Getty Institute</dc:publisher><dcterms:created>2026-03-30 20:57:54</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">azure</dcterms:alternative> <dcterms:alternative xml:lang="en">genuine ultramarine</dcterms:alternative> <dcterms:alternative xml:lang="en">lapis lazuli blue</dcterms:alternative> <dcterms:alternative xml:lang="en">lapis lazuli ultramarine</dcterms:alternative> <dcterms:alternative xml:lang="en">lapislazuli</dcterms:alternative> <dcterms:alternative xml:lang="en">lazuline blue</dcterms:alternative> <dcterms:alternative xml:lang="en">natural ultramarine</dcterms:alternative> <dcterms:alternative xml:lang="en">natural ultramarine blue</dcterms:alternative> <dcterms:alternative xml:lang="en">royal blue</dcterms:alternative> <dcterms:alternative xml:lang="en">ultramar</dcterms:alternative> <dcterms:alternative xml:lang="en">ultramarine</dcterms:alternative> <dc:description xml:lang="en"><![CDATA[ A natural inorganic blue pigment with slight red cast made from the ground, separated blue particles (lazurite) from the gemstone lapis lazuli. It has good fade resistance, fair transparency, but poor resistance to acids. It was the most expensive pigment in Western Medieval and Renaissance painting and manuscript illumination, generally reserved for the robe of the Madonna or another prestigious figure. It darkened with age, thus the synthetic variety was developed in the 19th century; blue deposits on the walls of lime kilns had been used earlier to produce a similar pigment, "artificial ultramarine blue." ]]></dc:description></metadata>