64.0 Epidote hornfels. Locality is east of Alpine Lake, California along CA Highway 4. Granular yellow-green to dark green epidote is associated here, at a granite-biotite schist contact, with gray quartz, plus associated tiny black grains of biotite, and white alkali feldspar. Secondary, red hematite provides some red-colored coatings. Thin veins of unknown composition cut the sample.