Bertrandite : Be4(Si2O7)(OH)2
Quartz : SiO2
As recorded:
Noyes Mountain Quarry, Greenwood, Oxford County, Maine, USA
Collected by:
Photo added to mindat.org
“This specimen is from my personal collection and is approximately 4x2.5cm in size.”
William A. Thomas, Jr. - 4th November 2012
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