Gran Colombia Gold Completes Spin-Off of Marmato Mining Assets; Caldas Gold Expected to Commence Trading on February 28, 2020 Feb 25, 2020 | Companies News, Industry, Mining Visit Gran Colombia Gold Corp. page for more research, discussion boards and to like, and share. Source: https://finance.yahoo.com/news/gran-colombia-gold-completes-spin-163523088.html