- Calcite, Marcasite
- Linwood Mine, Buffalo, Scott Co., Iowa, USA
- Small Cabinet, 9.0 x 7.8 x 5.7 cm
Water-clear, glassy calcite scalenohedrons to 2.2 cm with very interesting, oriented inclusions of sparkly marcasite microcrystals cover this fine, pineapple-shaped specimen from the limestone quarries at Buffalo, Iowa. Ex. George Feist Collection.