** Shares of Gem Diamond Ltd GEMD.L down 5.5% at 15.5p
** The Lesotho-focused diamond miner cuts annual forecast
for tonnes treated to 4.9m - 5.1m tonnes as power cuts dragged
volumes of ore processed
** Adds lower tonnes treated impacted unit costs
** Carats recovered in HY down 2% to 50,601 carats, HY rev
at $21 mln
** Among top pct losers across all London shares
** Up to last close, stock almost halved in value so far
this year
(Reporting by Prerna Bedi in Bengaluru)
((Prerna.Bedi@thomsonreuters.com; +91 98052 24616;))