<?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">pearl</topic></authority><related type="narrower"><topic>freshwater pearl</topic></related><related type="narrower"><topic>blister pearl</topic></related><related type="other"><topic>imitation pearl</topic></related><related type="broader"><topic>combination inorganic/organic animal material</topic></related><variant type="other"><topic>pearls</topic></variant> <note xml:lang="en"><![CDATA[ A smooth round bead formed primarily within the shells of two distantly related groups of molluscan bivalves or clams, including the ocean-dwelling pearl oysters and the freshwater river mussels. Pearls are used in jewelry and for other ornamental puposes; they are considered a gem. ]]></note></mads>