![65.1 Calcite marble (coarse-grained). Santa Cruz, California. The rock is composed of white calcite, within the grains of which there are tiny, unidentified dark green minerals and reflective black grains, probably of graphite. [For scale, the field of view is about 4.25 cm wide.]](../65.1.JPG)
65.1 Calcite marble (coarse-grained). Santa Cruz, California. The rock is composed of white calcite, within the grains of which there are tiny, unidentified dark green minerals and reflective black grains, probably of graphite. [For scale, the field of view is about 4.25 cm wide.]