Formed as an extrusive igneous rock, Obsidian is a naturally occurring volcanic glass. When felsic lava is ejected from a volcano and after it cools down quickly with minimal crystal growth then obsidian is produced. Obsidian is commonly found in the places where rhyolitic lava eruptions happen. Obsidian is a parent material formed from quickly cooled lava and it is not a mineral, but a mineral-like, as it is not crystalline as well as its composition is too variable to be classified as a mineral. Well, it can be classified as a mineraloid. Around 70 per cent silicon dioxide (SiO2) is present in Obsidian. Usually, pure obsidian is dark in color but due to the impurities the color may vary. With the presence of iron the obsidian may appear black, brown or dark brown in color. In some of the obsidian there are traces of small, white, radially clustered crystals of cristobalite in the black glass which forms a snowflake like patter and hence the obsidian is termed as snowflake obsidian. Pioneer vsx 922 service manual. Also in some obsidian there is a pattern of gas bubbles which produce golden sheen effects making it sheen obsidian. Whereas the third type of obsidian is Rainbow Obsidian in which an iridescent, rainbow like sheen is cause due to inclusions of magnetite nanoparticle.

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Rainbow Eye Obsidian Vs Rainbow Obsidian Color

1. Rainbow obsidian. Rainbow obsidian stone is a kind of obsidian, also known as rainbow eye obsidian or color eye obsidian. Obsidian is usually black, but it can also be seen in brown, gray and a small amount of red, blue or even green. The most famous is the Rainbow Obsidian with rainbow flash.
2. The obsidian is a Mysterious natural product, it usualy looks black under the ordinary outdoor light, but when it been irradiated by the light, it will show the colorful rainbow. So when the light is more stong, the rainbow eye will be more clear.