Minerals

Minerals can be collected from individually specific stones / rocks on the island. Each stone will have a lagel letting you know what type it is. Charcoal can be obtained from standard stone

You can convert the stone in the furnace to extract the corresponding items:

Mineral Ore => Metal Fragment

Copper Ore => Copper Bars

Silica Sand => Glass Fragment

Clay => Brick

Sulfure Ore => Sulfur

Sulfur + Charcoal => Gun Powder