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Minerals : Graphite on marble
Dimensions : (46.13×31.67×14.29) mm for matrix
Weight : 23g
Origin : Grenville, Québec
nformation : This graphite comes from a vein of graphite only in a marble and sandstone formation. The matrix is made of a graphite layer on marble. The graphite / marble proportion of the matrix is approximately 50% for 50%.