Fahlunite, cordierite (cordierite group)
Dimensions:0.3 cm and 0.5 cm
Object number: 2020.6.173
DescriptionTwo sample in vial, note on label states "?128-1 or 128-2", "1. relatively fresh cordierite 2. altered cordierite (soft, greenish, waxy luster"
Reference: F. Layman, 1964, thesis, Harvard.