Late 20th Century Obsidian Angelfish

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Gorgeous teal tone angel fish created out of Obsidian. The color is so brilliant and shows beautifully when the sunlight … Read more Gorgeous teal tone angel fish created out of Obsidian. The color is so brilliant and shows beautifully when the sunlight comes through it.
Obsidian is produced from 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 the lava, which inhibits the first step (nucleation) in the formation of mineral crystals. Together with rapid cooling, this results in a natural glass forming from the lava. See less