# Petra Petra, referred to as Protolith in mining contexts, is the genesis of more complex stones. It is usually some shade of brown, and can appear layered or jagged. ## Attributes - Quality: 1* - Formula: G(B) - AMP: 1 Farthing/kg ## Alchemy - Catalyst: N/A - Reagent: Chronos - Integrant: N/A ## Classifications - #Material - #Stone - #Isotope