Tristar Gold is developing the Castelo de Sonhos gold project in Pará state, Brazil into a major gold mine. The project has a mineral reserve of 1.4 million ounces of gold, with potential to increase significantly. A 2021 prefeasibility study showed strong economics, with a 28% post-tax IRR and $321 million NPV at $1,550 per ounce gold price. Tristar is advancing permitting and aims to begin construction upon receiving its prior license.