Necklace barrel Obsidian celestial on leather cord.
Obsidian is a natural glass, it is produced during a show of lava rich in silica with very little water (-3%). At the time of the volcano, it is very cooling freezing crystallization mechanisms. "It's like a piece of lava frozen when out of the volcano."
-Obsidian is formed quickly atoms are unable to get organised in crystalline structures. The result is a volcanic glass with a smooth uniform texture. Due to the lack of crystal structure, Obsidian to the edges sharp and very fine blades.
-This is a natural mineral material that has a composition too complex consisting of a single mineral. Though Obsidian is primarily SiO2 (silicon dioxide), usually from 70% or more.
-Clear its fracture is conchoidal and its hardness on Mohs scale is between 7 and 7.5 (she scratched the glass).
-Black is the most common color of Obsidian. However, it can also be brown or green. Rarely, Obsidian can be blue, red, orange or yellow.
-The color difference appears due to changes in the State of oxidation of the chemicals and impurities.
-This is a stone of dark color due to its rich in magnesium and iron. The surface of this gemstone is made of beautiful patterns in the form of scratches, patches, spots, inclusions or bands of color. These various patterns are created naturally when the formation of the stone.
-Sometimes two colors of Obsidian blends together in a single specimen. The most common color combination is black and Brown called "mahogany Obsidian".
-Obsidian may also have a metallic or iridescent appearance caused by light reflecting from tiny inclusions of mineral crystals, rock or gas. These specimens are coveted for jewelry making.
The formation of the "Celestial Eye" Rainbow Obsidian
-When are microscopic mica and feldspar crystals along the lava flow, beautiful colors are: blue, green, purple...
-So, this variety is called Rainbow Obsidian. Colors may appear in the form of layers on the surface of the stone.
-When object bulging achieving different colors appear and change depending on the angle of light reflection.
-This is one of the most coveted stones due to its beauty.
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