Thickly scattered grains of very pale mustard-yellow diopside in coarse-grained white calcite marble. The tiny black grains are graphite. Though an obvious color difference exists between the diopside grains and the enclosing calcite, in other specimens the color difference is almost nil and the presence of diopside is readily overlooked. No such problem exists under SW ultraviolet light; see photo DPS11b. This is specimen 3044 of the Mark Boyer collection.
Identifier: DPS11a Locality: Franklin Marble, Sussex County Specimen size: 8.5 x 6 x 4 cm Photo credit: Earl R. Verbeek
