Mineral Specimen and Product Inventory Search
- Lancaster, Worcester Co., Massachusetts, United States
- 10 x 6 x 3.5 cm - Cabinet
Chiastolite is a variety of Andalusite containg graphite inclusions giving it the cross patterns. As the Andalusite forms during metamorphism, the graphite aligns in cross-shaped patterns. Indeed this specimen consist of mostly graphitic schist.
This specimen was aquired by Hampson in 1944. The cross-sections are polished cuts in the andalusite to expose the crystals.