buhrstone

American  

[bur-stohn] / ˈbɜrˌstoʊn /

noun

1. a variant of burstone.

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buhrstone British  

/ ˈbɜːˌstəʊn /

noun

1. a hard tough rock containing silica, fossils, and cavities, formerly used as a grindstone

2. a grindstone or millstone made of this rock

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Etymology

Origin of buhrstone

C18 burr , perhaps identical to _burr ¹ (alluding to roughness)

Example Sentences

You can walk on a charming cobblestoned thoroughfare flanked by lovely 19th-century buhrstone buildings before arriving at the world’s only show court in a greenhouse: a semi-sunken 10,000-seat stadium that opened in 2019.

From New York Times

Lead, iron, coal, gypsum, manganese, zinc, antimony, cobalt, ochre of various kinds, common salt, nitre, plumbago, porphyry, jasper, chalcedony, buhrstone, marble, and freestone, of various qualities.

From Project Gutenberg