Crystallex appears to be a Canadian company:
U.S. court allows Venezuela's Guaido to argue in Crystallex case
Reuters
(Reuters) - A U.S. judge has ruled that Venezuelan opposition leader Juan Guaido’s representatives can present arguments in a court battle with Canadian mining company Crystallex International Corp, a boost to his efforts to retain control of the country’s overseas assets.
Guaido, who heads the opposition-controlled National Assembly, invoked the constitution to assume an interim presidency in January, arguing President Nicolas Maduro’s 2018 reelection was fraudulent. He has been recognized as Venezuela’s rightful leader by most Western countries, including the United States.
His team has sought to take control of overseas assets owned by state oil company Petroleos de Venezuela, namely U.S. refiner Citgo. But Citgo is under threat from Venezuela’s creditors attempting to seize shares in the company in return for unpaid debts.
Read more at: https://www.reuters.com/article/us-venezuela-politics-crystallex-idUSKCN1R22C4
