<?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">opus lapilli</topic></authority><related type="broader"><topic>mosaic</topic></related><variant type="other"><topic>pebble mosaic</topic></variant> <note xml:lang="en"><![CDATA[ Process of creating mosaics using tiny pebbles set over three foundation layers: the bottom layer of large pebbles set on packed soil, second, of stone and gravel, crushed terracotta and Santorini powder from lava, and the top being a mixture of brick powder and fine sand that sets the pebbles. ]]></note></mads>