Gold prices eased on Tuesday, as investors watched for the impact of the Middle East conflict and stalled US-Iran peace talks on the interest rate outlook of key central banks that meet this week. Spot gold was down 0.2% at $4,670.89 per ounce, as of 0350 GMT. US gold futures for June delivery fell 0.2% to $4,684.70. US President Donald Trump is unhappy with the latest Iranian proposal on re