Tristar Gold is developing the Castelo de Sonhos gold project in Brazil, which has an indicated resource of 1.8 million ounces and a pre-tax NPV5 of $399 million at a $1,550 gold price. The project is set to begin commercial production with an estimated cash cost of $900/oz and a compelling IRR of 33%. However, the company faces various risks including fluctuations in gold prices, regulatory challenges, and potential operational difficulties.