- Calcite, Chalcopyrite
- Sweetwater Mine (Milliken Mine; Frank R. Milliken; Blair Creek; Ozark Lead Company Mine; Adair Creek; Logan Creek), Ellington, Viburnum Trend District, Reynolds Co., Missouri, USA
- Small Cabinet, 5.3 x 5.2 x 3.7 cm
A showy, "double-barreled," calcite crystal cluster very aesthetically angled on matrix from the Sweetwater Mine of Missouri. The pseudo-hexagonal, transparent to translucent, lustrous, amber calcite crystals have sharp, pyramidal terminations. The doubly terminated crystal is 5.3 cm long. One side of the sparkly, silicified limestone matrix is richly accented with iridescent, brassy chalcopyrite crystals. Classic Viburnum Trend material from the George Feist Collection, # 270.