China restricts access to 2 metals crucial to making semiconductors. What you need to know. By: MarketWatch July 07, 2023 at 15:40 PM EDT China restricts access to germanium and gallium, metals crucial to making semiconductors. Read More >> Related Stocks: Defense Metals Corp Freeport-McMoRan NEO Performance Materials Inc Teck Cominco Limited Vaneck Rare Earth Strategic Metals ETF