June 30 (Reuters) - Gold firmed on Thursday as U.S. Treasury yields dipped, but faces its worst quarter since early 2021, as the dollar cemented its place as the safe-haven asset of choice, amid top central banks adopting aggressive tactics against runaway inflation. FUNDAMENTALS * Spot gold <XAU=> was up 0.1% at $1,818.31 per ounce by 0115 GMT. U.S. gold futures <GCv1> also firmed 0.1% to $1,819.70. * Benchmark U.S. 10-year Treasury yields inched down, increasing the appeal of non-yielding gold.
