Rainbow obsidian is a form of volcanic glass formed when lava cools rapidly without crystallizing, and its vivid colors result from thin-film interference caused by microscopic layers of magnetite inclusions that are thinner than the wavelength of light, creating the illusion of color through precise physics rather than pigments.
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Project Rock Garden - Humble Stones: Rainbow ObsidianAdded:
Consider this. When lava erupts from the earth and cools with extraordinary speed, it does not form crystals. It becomes glass, black volcanic [music] glass known as obsidian. Yet within certain flows, microscopic inclusions [music] of magnetite align in perfect layers, creating thin film interference that produces these vivid bands of red, blue, green, and purple.
What appears [music] as mere color is actually the result of precise physics, light bending through structures thinner than a wavelength. A stone born [music] of fire, yet it reveals the hidden order within chaos.
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