** Shares of American Rare Earths ARR.AX rise as much as
12.2% to A$0.275
** Stock set to gain most since April 26, if current gains
hold
** Rare earths explorer says grant proposal approved by
State of Wyoming for Cowboy State Mine at Halleck Creek
** Adds, secures A$10.7 million ($7.12 million) funding
** Stock hits its highest level since June 3
** Stock has risen over 48% this year, as of last close
($1 = 1.5038 Australian dollars)
(Reporting by Rajasik Mukherjee in Bengaluru)
((Rajasik.Mukherjee@thomsonreuters.com;))