Mineral Species: Vesuvianite

Chemical Formula: Ca10Al4(Mg,Fe)2Si9O34(OH)4

Chemical Name: Calcium Aluminium Magnesium Iron Silicate

Mineral Class: Sorosilicate

Mineral Notes: Vesuvianite is sometimes referred to as Idocrase. It is a relatively common mineral found in contact metamorphosed impure limestones, where it occurs in association with Calcite, Garnets, Diopside and Wollastonite. However well-formed, large crystals are rare. The silicate was first discovered on mount Vesuvius in italy, from which it gets its name. It is sometimes found in jade-like forms which are used for ornamental carving. 

Description: A single large, matrix-free, crystal of green Vesuvianite. Both ends show good terminations. Bisecting the body of the large crystal is an unusual penetration twin crystal. The transparency and bright glassy luster make this specimen very gemmy. It is rare to find crystals of this natural form and quality.

Location: Asbestos, Quebec, Canada.