** Shares of Stanmore Resources SMR.AX fall 7.6% to A$2.66, set for their biggest daily pct loss since early-December 2023
** Mineral explorer says December-quarter run of mine coal mined was 4.1 mln tons (mt), down from 5.8 mt in the previous quarter
** Says its quarterly saleable coal produced was 3.3 mt vs 3.8 mt in prvs quarter
** Stock fifth-biggest loser in the benchmark ASX 200 index .AXJO
** Shares hit their lowest level since Sept. 23, 2024
** Stock fell 25% last year
(Reporting by Kumar Tanishk in Bengaluru)
((Tanishk.Kumar@thomsonreuters.com;))