Calcite and Fluorite, Naica Complex, Chihuahua, Mexico, Mined c. 1970s, Eric Petersen Collection, 4.0 x 5.0 x 5.2 cm, $25. Online 3/4/15 SOLD
Group of ivory white calcite rhombs stacked up over sphalerite breccia. Many small very light green fluorite crystals are scattered over the calcite. Undamaged, mined c. 1970s. Eric Petersen Collection.