Figure 6.01. Garnet-Hornblende Schist. Cut and polished surface of Ordovician Hawley Formation, Hawley, MA, USA. Burgundy red garnet and sprays of black hornblende in a matrix of green chlorite, muscovite, plagioclase, and quartz. The field of view is about 20 cm across. Use your mousewheel to zoom and pan to see details. Click on the "Show Hres" button to see a higher resolution image. John Brady photo of a sample provided by Johanna Andersen-Pratt of Ashfield Stone.