Gold and GemStone Mining Inc. announces gold and diamond prospecting results for first Sierra Leone mining concession in the Nimikoro Chiefdom, Kono District

DRAPER, UT--(Marketwire - Jun 7, 2012) - Gold and GemStone Mining Inc. (OTCBB: GGSM) today announced the results of the first prospecting activities from its exciting portfolio of proven alluvial gold and diamond mining concessions in the Kono District of...