<?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">diamond</topic></authority><related type="narrower"><topic>industrial diamond</topic></related><related type="narrower"><topic>treated diamond</topic></related><related type="narrower"><topic>rough diamond</topic></related><related type="narrower"><topic>blue diamond</topic></related><related type="other"><topic>diamond graders</topic></related><related type="other"><topic>diamond cutters</topic></related><related type="broader"><topic>mineral</topic></related><related type="broader"><topic>gemstones by specific type</topic></related><variant type="other"><topic>diamonds</topic></variant> <note xml:lang="en"><![CDATA[ A highly transparent and exceedingly hard mineral of carbon; it is the hardest known substance. ]]></note></mads>