Graphite tutorial Optical mineralogy
Channel: Matt Kohn
Date: 2021-05-04

Several videos of graphite in thin section, showing typical textures and optical characteristics. Supported by Boise State University and the US National Science Foundation.
Key characteristics: Black (opaque), super fine-grained, can be segregated into layers, forms inclusion trails in micas and garnet.
00:00​ Graphite-bearing marble
00:31 Graphite-bearing schist; clear layers are muscovite-rich

01:02 Inclusion trails in muscovite and garnet
01:33 Crenulated graphitic schist, low and medium magnification