International retailers are feeling the pinch of high gold prices and seeing their markets split into high and low ends. But the forecast for 2013 and beyond remains bullish. Despite economic turbulence in Europe and a slowdown in China, the worldwide jewelry business continues to shine—or so a handful of jewelry trade editors and analysts tell JCK, describing the rosy state of the market in their regions.The future looks equally bright, they contend. For starters, jewelry sales saw double-digit growth in 2011 and the trend is likely to repeat itself in 2012, according to Euromonitor International, a market research firm that tracks jewelry sales in 32 countries. Fine jewelry is driving the growth, accounting for 87 percent of the estimated $275.4 billion global jewelry market. In fact, Euromonitor analysts say that within the past five years, fine jewelry has seen the highest growth p