* Reduced risk sentiment helps gold - analyst * Dollar firms near multi-month highs (Updates prices) July 20 (Reuters) - Gold prices climbed on Tuesday as concerns over the economic damage from surging Delta coronavirus cases, and a dip in U.S. Treasury yields boosted the safe-haven metal’s appeal. Spot gold rose 0.6% to $1,823.06 per ounce by 1254 GMT, having hit a low of $1,794.06 in the previous session. U.S. gold futures gained 0.8% to $1,824.20. “The great problem currently is the fear about the economic impact of the Delta variant of the coronavirus and after Japan took severe measu...