Dawsonite is a mineral composed of sodium aluminium carbonate hydroxide, chemical formula NaAlCO3(OH)2.

It was discovered in 1874 during the construction of the Redpath Museum in a feldspathic dike on the campus of McGill University on the Island of Montreal, Canada.

[2] It is named after geologist Sir John William Dawson (1820–1899).

[3] The type material is preserved in the collection of the Redpath Museum.

This article about a specific carbonate mineral is a stub.