Shares in Rare Earth Minerals PLC (LON:REM) advanced as it revealed a further licence for the Cinovec lithium and tin project had been granted.
The new area claimed fills the gap between European Metal Holdings' (LON:EMH) Cinovec II licence and the Czech-German border over the northern part of the deposit, and extends east.
It includes some potentially deeper high grade lithium and tin targets that could be extracted in a future Cinovec mine.
The extent of the new Cinovec III licence is 6.8 sq km and the best lithium intercept recorded in historic drilling is 82.8 metres averaging 0.31% lithium, starting at depth of 585 metres, REM revealed.
Rare Earth Minerals chief executive Kiran Morzaria told investors: "The granting of these licences has secured 100% of the known mineralisation of the Cinovec ore body and adjacent mineralised areas in the Czech Republic.
"It has also secured some potential deeper high grade lithium and tin targets which could be extracted from some of the deeper levels of the future Cinovec mine"
European Metals' chief Keith Coughlan added: "Having this licence granted means that the company now controls 100% of the known mineralisation of the Cinovec ore body and adjacent mineralised areas."
REM shares added 1.65% to 0.615p in early deals.