Located in the heart of Asbestos city in southeastern Quebec, Jeffrey Mine started production of chrysotile or white asbestos in 1879. Chrysotile is the most common form of asbestos belonging to the serpentine group of phyllosilicates minerals. The mineral asbestos attracted the industrialists of the 90s due to its numerous properties. Over the years, the dangers associated with various forms of asbestos were identified lowering the demand for this mineral worldwide. The Quebec government has stopped funding the mining of Asbestos shutting down the largest mine of the region: Jeffrey Mine. This open-pit and underground mine reached a depth of 350 m. Today, the pit no longer exists as it has been reclaimed.