Barite in Sphalerite from Sterling Mine, Stoneham, Weld County, Colorado petrified_wood The scolecite crystals have glassy

The scolecite crystals have glassy crystal faces and are mostly translucent with transparent four-sided pyramidal terminations

Coarsest octahedrite (IIB)

Several purple amethyst quartz crystals on matrix with epidote micro crystals The crystals are fully terminated with lustrous glassy faces with several crystals having double terminations

This one has been prepared in a reflexed position

Barite in Sphalerite from Sterling Mine, Stoneham, Weld County, Colorado petrified_wood The scolecite crystals have glassyFrom Sterling Mine, Stoneham, Weld County, Colorado Cluster of intersecting transparent many prismatic blue barite crystals in sphalerite matrix. Weight: 442. 9 grams, Dimensions: 5 x 2 x 3. 5 inches