The agreement was set up in August 2017 and ending the arrangement will see Wishbone pay about £120,000 owed and a final settlement payment of £274,000.
Shares were placed at 0.1p to raise the cash, with subscribers also receiving a warrant exercisable at the issue price.
In addition, directors have agreed to receive shares in lieu of £233,000 fees and expenses owed up until September 2018 at a price of 0.11p per share.
Chairman Richard Poulden’s stake is now 28.1% with other directors owning 5.1% between them.
Wishbone trades gold and supplies equipment and know-how to artisanal miners in Thailand.