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The spectacular display of colors these specimens display can be formed by two different geological processes: the oxidation of pyrite causing ultra-thin layers of iron oxide to form on the surface
Coarse Octahedrite IAB-MG
which is a brilliant mineral in the aragonite family known for its twinning crystalline structure and delicate form
Creedite is named for the place of its initial discovery
resulting from the oxidation of its copper and sulfide components
Chalcedony Tanzanite The spectacular display of colorsA silicone based mineral closely related to quartz and agate, Chalcedony has a unique crystalline structure that gives it an enormously variable appearance. This mineral forms in a similar fashion to agates and geodes but due to heat and pressure at the time of formation results in a distinct look and almost silky texture. Chalcedony can be found in a range of colors but most often occurs in semitransparent or white. It has a long archaeological
