Minecraft wiki entry for Rock, associated text: Andesite – a light-colored rock found in solitary underground blobs
Blackstone – a material only found in large blobs in the Nether's basalt deltas; useful for crafting
Deepslate – a dark gray rock sometimes found in blobs close to the deepslate layer
Diorite – a light-colored rock, similar in color to andesite but coarser-looking; found in solitary underground blobs
Granite – a pinkish rock found in solitary underground blobs
Tuff – a brownish rock commonly found in solitary underground blobs within the deepslate layer
Calcite - a white rock that decorates Mountains in blobs