Fig. 3b. Same as Fig. 3a but with quartz plate inserted. An amorphous patch of K-feldspar (K₂') with vermicular perthitic albite (Ab₂'; blue) and relics of perthitic albite (Ab₁; yellowish white) is shown. Swapped rows of albite (white and blue) occur along the boundary between two differently oriented K-feldspar crystals K₁ and K₂'; K₁ and K₃; K₁ and K₃', but not apparent and clear between K₃' and K₂' due to their approaching orientation). From Huangnitian quartz syenite. Scale bar = 0.5 mm.