fine transparency chlorite as a mineral specimen and ... (Fe, Mg, Al)6(Si, Al)4O10(OH)8, Iron Aluminum Magnesium Silicate Hydroxide. Class: Silicates Subclass: phyllosilicates Group: ... an hexagonal outline. Usually found as alteration products of iron-magnesium minerals and as inclusions in other minerals. ... , serpentine, danburite, topaz and calcite, among many others. fine transparency chlorite