<?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">opal glass</topic></authority><related type="broader"><topic>glass by property</topic></related><variant type="other"><topic>glass, opal</topic></variant><variant type="other"><topic>opalescent glass</topic></variant><variant type="other"><topic>opaline</topic></variant><variant type="other"><topic>opaline glass</topic></variant> <note 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.  ]]></note></mads>