Aurichalcite in Calcite
Ojuela Mine, Mapimi, Durango, Mexico
Small Cabinet, 7.3 x 5.4 x 4.0 cm
This matrix specimen contains the largest rhombs of equant, lustrous and translucent calcite, in this lot. They reach 3.2 cm on edge and 4 cm across! The large crystal actually exhibits stepped growth. Differential inclusions of fibrous, aurichalcite have given the crystals a two-tone, blue coloration. Simply outstanding geometry and the shocking fake-blue color inside otherwise colorless calcite make this a good specimen, borderline great except for jhust a small bit of peripheral edge wear. Few calcite rhombohedra of such size were recovered, and this stands out very nicely in the lot as an excellent example of CALCITE from this find, more than most pieces which are simply for color or the lure of the association