"Color in the beryl group". Mineral Spectroscopy Server. minerals.caltech.edu. California Institute of Technology. Archived from the original on 22 August 2011. Retrieved 6 June 2009.
"The Rose of Maine". Maine Geological Survey. 6 October 2005. Archived from the original on 10 July 2009. Image of "The Rose of Maine" at the site of its discovery.
"Color in the beryl group". Mineral Spectroscopy Server. minerals.caltech.edu. California Institute of Technology. Archived from the original on 22 August 2011. Retrieved 6 June 2009.
"The Rose of Maine". Maine Geological Survey. 6 October 2005. Archived from the original on 10 July 2009. Image of "The Rose of Maine" at the site of its discovery.