** Shares of gold explorer Emerald Resources EMR.AX down 3.7% at A$3.545
** Stock falls as much as 12% earlier in the day to A$3.24, its lowest level since January 25
** Co reports quarterly gold sales of 16.9Koz from its Okvau gold mine operation, down from 28.6Koz last year
** Says production for September and December quarters expected between 25Koz and 30Koz each
** Last year, production was 28Koz in September qtr and 31.9koz in December qtr
** About 3.6 mln shares change hands, 1.2x the 30-day average of nearly 3 mln
** Stock up 7.1% YTD, including moves in current session
(Reporting by Jasmeen Ara Shaikh in Bengaluru)
((JasmeenAraIslam.Shaikh@thomsonreuters.com;))