Fluorescent Hexagonal Sandwich Calcite Crystal Cluster pink heulandite Some common colors are blue

Some common colors are blue

Amethyst stalagmite slices are a type of mineral formation that occur when water containing dissolved silica and iron flows over the ceiling of a cave and forms icicle-like structures

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

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

Fluorescent Hexagonal Sandwich Calcite Crystal Cluster pink heulandite Some common colors are blueHighly 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