** U.S.-listed shares of silver miners fall premarket, tracking prices of the white metal GOL/
** Spot silver XAG= down 1.4% at $78.81/ounce
** Prices fall weighed down by a firm US dollar as lingering uncertainty over U.S.-Iran peace talks kept investors cautious, while they also looked forward to a Senate confirmation hearing for Federal Reserve chair nominee Kevin Warsh
** Shares of miners Hecla HL.N and Coeur CDE.N both down ~1%
** Canadian miner Endeavour Silver EDR.TO, EXK.N dips 1.4%
** Abrdn Physical Silver Shares ETF SIVR.P and iShares Silver Trust SLV.P both inch down 1.1%
(Reporting by Dharna Bafna in Bengaluru)
((dharna.bafna@thomsonreuters.com))