Obsidian is rapidly cooled volcanic glass—a mineraloid rather than a true mineral—with a conchoidal fracture sharp enough that Mesoamerican cultures shaped it into blades

Mahogany obsidian is volcanic glass: felsic lava cooled so quickly that no crystals had time to form

Silica-rich water seeps in over millions of years and deposits quartz crystal from the outer wall inward

active energy

each one long associated with voice and expression

Green Fluorite Pyramid Size 1.75"x1.5"x1.5":$49 Obsidian is rapidly cooled volcanicA pyramid that holds the full fluorite color spectrum in a single carved face. Fluorite is calcium fluorideCaFa halide mineral with a Mohs hardness of 4 and perfect octahedral cleavage in four directions, which is why a fractured edge catches light in a characteristic staircase pattern. Green fluorite owes its color to trace impurities within the crystal structure; the same species produces purple, blue, yellow, and colorless specimens from the same