Obsidian is a naturally occurring volcanic glass formed when lava extruded from a volcano cools rapidly with minimal crystal growth. It is an igneous rock. Obsidian is produced from felsic lava, rich in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium. It is commonly found within the margins of rhyolitic lava flows known as obsidian flows. These flows have a high content of silica, giving them a high viscosity. The high viscosity inhibits diffusion of atoms through
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Obsidian, a volcanic glass, has been highly prized in the world of stone tools for thousands of years. Formed when lava cools rapidly, obsidian's unique composition and high silica content makes it incredibly sharp and relatively durable, perfect for crafting blades, arrowheads, and other essential tools. From ancient times, obsidian has been valued for its beauty and functionality, with many cultures relying on it for survival. Today, we can admire the determination of our ancestors, who harnes
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a obsidiana es una roca ígnea extrusiva, formada casi por completo por vidrio volcánico natural, que surge del enfriamiento rápido de lava rica en sílice. Este proceso impide que se desarrollen cristales, lo que le otorga su distintiva apariencia brillante y vítrea. Al originarse de lava que se enfría rápidamente en la superficie, no posee una estructura mineral definida y se considera un vidrio natural en lugar de un mineral. Aunque su color más común es el negro, la obsidiana puede presentar t
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