This oldtimer is an example of the species combinations for which the Mammoth Mine was so famous. Drusy, emerald green, lustrous, translucent, dioptase is associated with acicular, lustrous crystals of cerussite, to 1.2 cm in length along with a few, orange, wulfenite crystals, to .5 cm across. In fact, the whole matrix is highly porous, giving a home to the various species.