Dims: 1.9 x 1.8 x 1.2" (4.7 x 4.5 x 3.0 cm)
Wt: 2.5 oz. (71 g)
Cava Novella, Vesuvio, Napoli, Italy
I am relatively sure that this hand specimen is composed entirely of compact granular and crystalline Humite. Most of the material is granular, showing no crystalline form, but there are pockets that contain small white or brown crystals that show reasonably good orthorhombic crystals. These have a rather bright, vitreous luster, whereas the granular material is generally somewhat duller. The crystals also show considerable translucence and even transparence, whereas the massive material is opaque.