a beautiful bright green Chromian Vesuvianite 37mm x 20mm x 25mm Jeffrey mine, Asbestos, Les Sources RCM, Estrie, Quebec, Canada--> (285) this piece is currently available^ *The Jeffrey Mine is a household name amongst mineral collectors all over the world, famed for its beautiful specimens of Vesuvianite, Grossular Garnet, Pectolite and Prehnite. The mine is recorded with over a hundred valid mineral species and three type locality species i.e. ~Jeffreyite (Be, Al Silicate) ~Nisnite (Nickel-Tin alloy) ~Spertiniite (Copper Hydroxide). **some history of The Jeffrey Mine--> The Jeffrey Mine was owned by the Johns Manville Corporation during the vast majority of its operation. The Johns Manville corporation is based in Denver, Colorado and primarily produces building materials such as roofing and insulation. The company is especially well known for its production of raw fiberglass. Until recently, many of these products contained chrysotile asbestos from the Jeffrey Mine. Johns Manville pioneered the early asbestos industry. They found many ways to use asbestos fibers in products such as insulation, roofing, and structural materials. In World War II, the US Government mandated that they produce many insulating products for the military, especially for naval use. **(kristalle) *(mindat)
Posted on: Sat, 10 Jan 2015 19:12:36 +0000
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