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An iridescent, rainbow-like sheen (fire obsidian) is caused by inclusions of magnetite nanoparticles creating thin-film interference. [26] Colorful, striped obsidian (rainbow obsidian) from Mexico contains oriented nanorods of hedenbergite, which cause the rainbow striping effects by thin-film interference. [25]
A drawing from the Catalog of the Royal Armoury of Madrid by the medievalist Achille Jubinal in the 19th century. The original specimen was destroyed by a fire in 1884. The maquahuitl (Classical Nahuatl: māccuahuitl, other orthographic variants include mākkwawitl and mācquahuitl; plural māccuahuimeh), [4] a type of macana, was a common weapon used by the Aztec military forces and other ...
Alchemical symbols were used to denote chemical elements and compounds, as well as alchemical apparatus and processes, until the 18th century. Although notation was partly standardized, style and symbol varied between alchemists.
The media most commonly used in scrying are reflective, refractive, translucent, or luminescent surfaces or objects such as crystals, stones, or glass in various shapes such as crystal balls, mirrors, reflective black surfaces such as obsidian, water surfaces, fire, or smoke, but there is no special limitation on the preferences or prejudices ...
Mirrors were associated with fire in Mesoamerica, and representations of mirrors could take the form of flowers and be combined with representations of butterflies. Both butterflies and flowers were associated with fire in central Mexico from the Classic to Postclassic periods, with butterflies representing flames. [ 12 ]
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