BUZZ-Gold, silver stocks hit new 52-week highs as metal prices rise
** Gold and silver miners surge as a weak dollar keeps gold near three-week highs and silver prices also gain
** All 30 constituents of the Thomson Reuters North America Gold index move higher, led by Premier Gold's 7.8 percent rise
** Newmont Mining rises as much as 3.8 pct to more-than three-year high of $36.30
** Royal Gold rises as much as 5.6 pct to a new 52-week high of $66.33
** Big miners: Barrick Gold up 4.2 pct, Agnico Eagle up 2.6 pct at new 52-week high, Iamgold up 7 pct, Goldcorp 3 pct
** Silver miners hit at new 52-week highs: First Majestic Silver up 10 pct, Silver Standard Resources up 6 pct, Silver Wheaton gains 5.7 pct
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