Editing Metamorphic rock (section)

==Uses==
Slate tiles are used in construction, particularly as roof shingle.<ref name="slate-tile"/>

Quartzite is sufficiently hard and dense that it is difficult to quarry. However, some quartzite is used as [[dimension stone]], often as slabs for flooring, walls, or stairsteps. About 6% of crushed stone, used mostly for road aggregate, is quartzite.<ref name="MII"/>

Marble is also prized for building construction<ref>{{cite web |url=https://www.naturalstoneinstitute.org/default/assets/File/consumers/glossary.pdf |access-date=28 February 2021 |page=23-15 |title=Marble |website= Glossary of Terms |publisher=Marble Institute of America}}</ref> and as a medium for sculpture.<ref name="Angelo Ferrari"/>