These rocks seem to be extremely distorted. Many show stratification, but the rocks themselves glitter with interlocking crystals, and the layers are stretched into sheets and bands. The rocks have compositions that indicate a former existence as sedimentary or volcanic rock, but they certainly don't have the same dull earthy or porous textures of those rock families. And it's clear that they once shared the same hot, subterranean environment of the granites that surround them.
The most characteristic single feature of these textures is recrystallization: the enlargement of old mineral grains and the growth of new ones with unmelted rock.
Limestone becomes luminous marble, glowing with crystals of calcite.
Shale becomes schist, glittering with mica.
Sandstone become sugary quartzite, with quartz grains set together like a stained-glass window.