The mineral cavansite is a hydrated calcium-vanadium-silicate having the chemical formula Ca (V5 + O) Si4O10 · 4H2O. The fylosilicaat belongs to the micas. The green to dark blue canvasite has a glass luster, a blauwwite stripe color and a good cleavage in accordance with the crystal plane . The average density is 2.25 and the hardness is from 3 to 4. The crystal system is orthorhombic and the mineral is not radioactive. The name of the mineral canvasite is derived from the composition; the elements calcium, vanadium, and silica. The mineral canvasite is especially common in secondary mineralizations in andesieten and basalt. The type of location is near the Owyhee Dam in Malheur County, Oregon in the United States. Today Wagholi quarry near Pune in India is the principal location.