A vein of fibrous, deep blue azurite in a fine-grained, friable, dominantly olive-green matrix (nontronite?). The cross-fiber habit shows the vein opened nearly perpendicular to the vein walls. Fibrous azurite is rare from the Franklin-Sterling Hill area, but additional specimens are known. Ex Ray Latawiec collection; now specimen SHMM-1987 of the Sterling Hill Mining Museum.
Identifier: AZR4d Locality: Sterling Hill, Ogdensburg Specimen size: 4 x 2 x 1.5 cm Photo credit: Earl R. Verbeek