Fig. 13.-Primary muscovite (Ms) and metasomatic muscovite (Ms single prime)

The thick schistose muscovite (Ms) in contact with quartz (Q) is of primary origin, while the irregular branch-like muscovite (Ms single prime) replacing the biotite (Bi) and the K-feldspar (K) is of replacement origin. Crossed polars. Huichang granite, Jiangxi Province.