Home > California Borate Minerals – July 22 > MS0959 Howlite

Howlite - Sold

Howlite is a calcium borate silicate related to datolite. The type locality is in Nova Scotia. Dana & Brush (1861) in Dana's Fifth System of Mineralogy, named the mineral after Henry How (1828-1879), Canadian chemist, geologist, and mineralogist, University of King's College, Halifax. In California, porcelain like nodules from Tick Canyon are popular lapidary material. Some workers dyed the material blue, and sold the product as a turquoise substitute. In addition to the massive material, very rare secondary crystals of howlite also occur. This is such an example.