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¿Qué es la arena negra? Arena negra se compone de arena aluvial que consiste predominantemente de los granos de minerales pesados y oscuros o rocas, tambien se compone de magnetita y se encuentra comúnmente en depósitos de arena (o aluvial, ríos arroyos etc..) donde hay oro.
What is black sand? Black sand is made up of alluvial sand which consists predominantly of heavy and dark mineral grains or rocks, it is also made up of magnetite and is commonly found in sand deposits (or alluvial, rivers, streams etc.) where there is gold.