The price of one metric ton of diesel can vary significantly depending on the location, supplier, and current market conditions. As of my last knowledge update in September 2021, the average price of one metric ton of diesel was approximately 1,050 USD (US dollars). However, it's important to note that this price can fluctuate over time and can be influenced by various factors such as global supply and demand, production costs, political events, and market speculation.
For the most up-to-date and accurate pricing information, I recommend checking reputable sources such as commodity price indices or consulting with industry-specific experts or market analysts.