Slate is a fine-grained, metamorphic rock that shows no obvious compositional layering but can easily be split into thin slabs and plates. It is usually formed by low-grade See more

Slate is found in the Arctic and was used by Inuit to make the blades for ulus. China has vast slate deposits; in recent years its export of finished … See more

• Page, William (ed.) (1906). The Victoria History of the County of Cornwall; vol. I. (Chapter on quarries.) Westminster: Constable.
• Hudson, Kenneth (1972). Building Materials; … See more

Before the mid-19th century, the terms "slate", "shale", and "schist" were not sharply distinguished. In the context of underground See more

Construction
Slate can be made into roofing slate, a type of roof tile which are installed by a slater See more

• Bluestone in South Australia, a form of slate used extensively in Adelaide 1850s–1920s See more

• AditNow—Photographic database of mines
• Granville Slate Museum
• Hower’s Lightning Slate Reckoner (1884/1904), by F. M. … See more