G. S. I., Calcutta. FIG. 4. SCHEELITE (DARK GREY) REPLACING WOLFRAM (LIGHT GREY). (X 54). 1. Dunn, Photomicros. FIG. 3. WOLFRAM (W) PARTLY ENCLOSING A TOURMALINE CRYSTAL (T) IN QUARTZ (Q). (x 54). . G. S. I., Calcutta. id. Dunn, Photomicros. FIG. 3. PYRITE VEINLETS IN QUARTZ (Q) AND WOLFRAM (W). (x 54). FIG. 4. PYRITE (P) VEINING TOURMALINE (T) AND BOTH REPLACED AND VEINED BY CHLORITE (C). (x 54). |