Si se corta paralelamente su color es negro, pero cortada perpendicularmente su color es gris. Obsidian can be found all over the world in areas with volcanic activity. If trace elements are present in the rock, it might also take on rarer shades, such as red, orange, yellow, or blue. Tiene la cualidad de cambiar su color según la manera de cortarse. Black is the most common color of obsidian, although it can also often be found in shades of brown and green. El hierro y el magnesio la colorean de verde oscuro a marrón oscuro. Su color es negro, aunque puede variar según la composición de las impurezas del verde muy oscuro al claro, al rojizo y estar veteada en blanco, negro y rojo. La superficie de rotura es concoidea, es decir, curva. Su dureza en la escala de Mohs es de 5 a 5,5. A menudo se le clasifica como un mineraloide. La obsidiana no es un mineral, porque no posee una composición química bien definida. Su composición es parecida al granito y la riolita. La obsidiana, llamada a veces vidrio volcánico, es una roca ígnea volcánica perteneciente al grupo de los silicatos, con una composición química de silicatos alumínicos y un gran porcentaje de óxidos sílicos. If it is cut parallel its color is black, but cut perpendicularly its color is gray. What does lava polymerization refer to Bonds between silica and oxygen atoms Breaking polymer chains in lava Mixing of lavas Crystallization of lava 2. It has the quality to change its color according to the way of being cut. ![]() Iron and magnesium color it from dark green to dark brown. ![]() Its color is black, although it can vary according to the composition of the impurities of very dark green to light, reddish and be veined in white, black and red. The breaking surface is conchoidal, ie, curved. Its hardness on the Mohs scale is 5 to 5.5. Obsidian is not a mineral, because it does not have a well-defined chemical composition. Its composition is similar to granite and rhyolite. Obsidiana Obsidian, sometimes called volcanic glass, is a volcanic igneous rock belonging to the group of silicates, with a chemical composition of aluminum silicates and a large percentage of silica oxides.
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