<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31471241</termId><termName>pietra di paragone</termName><termType>PT</termType><termNote><![CDATA[ An extremely hard variety of basalt that is jet black in color with a faint steak of mottled white; was often used as a touchstone for metallurgists. ]]></termNote><termCreatedDate>2026-03-30 21:06:49</termCreatedDate><relation><relationType>UF</relationType><termId>31471242</termId><termName>lapis liydius</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31457334</termId><termName>basalt</termName><termType>PT</termType></relation></term>  </Zthes>