* SPDR Gold holdings down 0.2 pct on Monday from Friday * Silver off 13-month lows, platinum off 3-week lows hit on Monday * GRAPHIC-2018 asset returns: tmsnrt.rs/2jvdmXl (Updates prices) By Zandi Shabalala LONDON, Aug 14 (Reuters) – Gold rose from near 18-month lows on Tuesday, attempting a break […]