Fluorescent Hexagonal Sandwich Calcite Crystal Cluster pink heulandite The pyrite crystals are perfectly

The pyrite crystals are perfectly formed cubes with twins and complex intergrowths

Size: 38 x 16 x 8 mm

Size: 75 x 57 x 45 mm

These beautiful amethyst crystals slowly precipitated from the silica-rich groundwater in a radial pattern in the narrow voids

With 365nm long wave UV

Fluorescent Hexagonal Sandwich Calcite Crystal Cluster pink heulandite The pyrite crystals are perfectlyHighly lustrous hexagonal sandwich calcite crystals in a stacked formation. Each stacked, tabular hexagonal calcite crystal shows an interlayering of white and clear greenish calcite. The clear light green layer has an alternating point up point down triangular geometry visible on the side faces. Slight green tint is from hedenbergite. The bottom has been smoothed a bit and there are some matrix mineral remnants. The calcite fluoresces a vibrant