isolated psilomelane mineral stone hard black manganese oxides white background |
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| navigate by keyword : food iron soil rock wood brown produce dessert geology carving snack baking chocolate organ meat isolated psilomelane mineral stone hard black manganese oxides white background noise grain texture group name including hollandite romanechite |
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| There is noise and grain caused by the texture of the stone. Psilomelane is a group name for hard black manganese oxides including hollandite and romanechite. |
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