Record of silica blended iron and magnesium oxides consists (MgO, Fe3O4) which is amorphous and lacks any regular internal atomic structure or external form regularly. The main color is black obsidian may take the other colors, depending on the impurities it contains and which gives him the brightest metal as they appear in the inside sometimes small spots resembling snowflakes.
Tiger Eye is a colored quartz types of amorphous and predominant colors are golden brown and red are often planned structure.
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