British biologist Darwin 1844 obtained a button shaped glassy stone in Australia, which was later known as ""glass meteorite"" in the world. It is a natural glass substance. Because the appearance is similar to obsidian, it is also known as obsidian. But they are different in composition and structure. The shapes of most glass meteorites are similar to those of molten sputters. They are spherical, elongated, dumbbell shaped, droplet like, button shaped and irregular massive. It is scattered in groups on the continent or in the sea floor sediments. The glass meteorites are black, dark green and brown in color, with elongated bubbles and bubbles of different sizes on the surface. Some of them are like crater like patterns on the surface of the moon, with a density of about 2.38g/cm3.
Quantity: 1 piece
Weight: About 0.18 ounces"
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