"Silica (CivBE)"@en . . "Silica is a basic resource that can be improved by a Mine. Yield Modifiers: \n* +2 File:20xProductionBE.png Production from a Mine. \n* +1 File:20xHealthBE.png Health if city has built an Optical Surgery."@en . "Silica is a basic resource that can be improved by a Mine. Yield Modifiers: \n* +2 File:20xProductionBE.png Production from a Mine. \n* +1 File:20xHealthBE.png Health if city has built an Optical Surgery."@en . . . . .