What is the difference between obsidian and coal

Learn more about Obsidian vs Coal in the next section. The interior uses of Obsidian include Decorative aggregates and Interior decoration whereas the interior uses of Coal include Not yet used. Due to some exceptional properties of Obsidian and Coal, they have various applications in construction industry. The uses of Obsidian in construction industry include Arrowheads, Cutting tool, Knives, Scrapers, Spear points and that of Coal include Cement manufacture, For road aggregate, Making natural cement, Steel production.

Here you can know more about Obsidian and Coal. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Obsidian and Coal consists of mineral content and compound content. You can also check out the list of all Igneous Rocks.

When we have to compare Obsidian vs Coal, the texture, color and appearance plays an important role in determining the type of rock.

Obsidian is available in black, blue, brown, green, orange, red, tan, yellow colors whereas, Coal is available in black, brown, dark brown, grey, light to dark grey colors. Properties of rock is another aspect for Obsidian vs Coal. The hardness of Obsidian is Streak of rock is the color of powder produced when it is dragged across an unweathered surface. Once these discoveries were made, obsidian quickly became the raw material of preference for producing almost any sharp object.

Fire Obsidian Fire Obsidian is a rare form with an iridescent quality and is found in the Northwest of the U. Black Obsidian will do just fine in a salt water bath.

This article can give you more information on crystals that can be damaged by water. Green obsidian is rare, and there are very minor deposits in some countries that are producing stones that appear in green ray energy, naturally.

Usually, dark green obsidian is safe to consider natural, as it occurs when there is both iron and magnesium present during formation. There is naturally occurring green obsidian, but it is rather rare. I only know of a couple of confirmed localities for it, and they are both in the Western Hemisphere — but that may be a locational bias on my part, being in the Western Hemisphere myself.

Purple Obsidian aids us in clearing out mental blockages and promotes focus and clarity of thought. It can also assist in reaching a state of peacefulness and serenity. When the lava is released from volcano, it undergoes a very rapid cooling which freezes the mechanisms of crystallization. The result is a volcanic glass with a uniform smooth texture. Coal forms from the accumulation of plant debris in a swamp environment which is buried by sediments such as mud or sand and then compacted to form coal.

What Is Banded.. Compare Igneous Rocks » More. Obsidian vs Peridotite. Obsidian vs Scoria. Obsidian vs Andesite. Hematite or limonite add a red or brown color to the obsidian. A lot of microscopic rock and mineral particles usually cause the jet black color most closely associated with obsidian. It can cause the obsidian to have a gold or silver shine if the bubbles were spread almost flat.

Obsidian has a strong conchoidal fracture and luster. It means that the top of the fracture is curving smoothly like a seashell. Obsidian appears to be black. Minute inclusions and tiny crystals in the glass create it hue.

Due to the near absence of mineral crystals in the glass, this smooth, curved form of fracture surface occurs. Conchoidal fracture surface intersections may be sharper than a knife. Obsidian, igneous rock that occurs as a natural glass produced by the rapid refreshment of viscous volcanic lava. Obsidian is extremely silica-rich around 65 to 80 percent , low in water, and has a rhyolite-like chemical composition.

Obsidian has a luster of glass and is somewhat stronger than window glass. Friday, November 12, Sign in.