Geological Reconnaissance of the Grizzly Creek Gemstone Deposit, Laramie Mountains, Wyoming: Potential Source of Iolite, Sapphire, Ruby and Kyanite (2004)

Hausel, W.D., and Sutherland, W.M., 2004, Geological reconnaissance of the Grizzly Creek gemstone deposit, Laramie Mountains, Wyoming—Potential source of iolite, sapphire, ruby and kyanite: Wyoming State Geological Survey Open File Report 04-14, 8 p.