<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31344512</termId><termName>zircon</termName><termType>PT</termType><termNote><![CDATA[ Mineral which has various colors and is a common accessory mineral in siliceous igneous rocks, crystalline limestone, schists, and gneisses. ]]></termNote><termCreatedDate>2026-03-30 20:32:54</termCreatedDate><relation><relationType>BT</relationType><termId>31320469</termId><termName>mineral</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>31376754</termId><termName>gemstones by specific type</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>31343249</termId><termName>silicates</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31375376</termId><termName>hyacinth</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31343575</termId><termName>zirconium</termName><termType>PT</termType></relation></term>  </Zthes>