They are both metamorphic rocks.
The presence of visible minerals aligned in bands or layers would distinguish schist and gneiss from quartzite and marble. Schist and gneiss show foliation due to intense metamorphism, while quartzite and marble are more homogenous in texture.
slate, marble and gneiss
marble
Gneiss is composed of mineral grains that are arranged into distinct layers or bands. The most common minerals found in gneiss include quartz, feldspar, and mica. The banding in gneiss is a result of intense heat and pressure during its formation, causing the minerals to segregate into layers.
gneiss, schist, slate
marble used to be limestone
- Amphibolite - Eclogite - Gneiss - Greenstone - Hornfels - Marble - Migmatite - Phyllite - Quartzite (Metaquartzite) - Schist - Slate - Soapstone
they're all metamorphic
Marble Gneiss Schist
The metamorphic rock marble would react with hydrochloric acid.
there are many, look at this link:What_are_some_examples_of_metamorphic_rocks
Shale is a sedimentary rock, not a metamorphic rock.