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Crookesite
open-in-new
<p>Crookesite is a <a href="/facts/Selenide/vA9Ls4xH">selenide</a> <a href="/facts/Mineral/LkUFbNmv">mineral</a> composed of <a href="/facts/Copper/I8PEE8oX">copper</a> and <a href="/facts/Selenium/k975NApC">selenium</a> with variable <a href="/facts/Thallium/v35pGMJB">thallium</a> and <a href="/facts/Silver/xXe41BGg">silver</a>. </p>