What makes this coffee particularly distinctive is its volcanic fermentation. Freshly harvested cherries are carefully piled into volcano-shaped mounds on drying patios, where they ferment for around 40 hours. The shape helps retain heat while allowing the fermentation to develop naturally through the interaction of local microorganisms, ambient yeasts, and the sugars in the cherries. The coffee is regularly turned before being moved to raised beds or a greenhouse for slow drying, creating the depth and distinctive character that make Mio Corcalla such a memorable Brazilian coffee.