Glauconite : K0.60-0.85(Fe3+,Mg,Al)2(Si,Al)4O10](OH)2
2inches x 1inches x 1inches
Photo added to mindat.org
“Dimensions: 2" x 1" x 1"
Cherty mass with pale green glauconite. Some fine quartz druse is also scattered about the specimen.”
John Krygier - 11th June 2010
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