- Calcite on Galena
- Cabinet, 12.9 x 10.3 x 7.1 cm
- Naica, Chihuahua, Mexico
- Ex. Richard Heck
Dramatic large specimen! A matrix of splendent, battleship-gray, galena crystals to 4.2 cm across is the pedestal for an unusual, pineapple-shaped compound crystal of lustrous, translucent, white calcite. The terminations of the large rhombohedral calcite, which are complete around the top, have "exploded" into many small, sharp "dog-tooth" scalenohedrons. The calcite rests on a fluorite crystal, mostly buried beneath and inside of the overlaying calcite but visible through the (broken off, and thus exposed) backside of the piece.