Tags: Chemical Substance, Mineral.
Howlite a calcium borosilicate hydroxide (Ca2B5SiO9(OH)5) is a borate mineral found in evaporite deposits. Howlite was discovered near Windsor Nova Scotia in 1868 by Henry How (1828–1879) a Canadian chemist geologist and mineralogist. How was alerted to the unknown mineral by miners in a gypsum quarry who found it to be a nuisance.
