What are 5 facts about obsidian?
Mia Lopez
Updated on March 12, 2026
Interesting Obsidian Rock Facts:
Obsidian is also known as "nature's glass" because of its glassy appearance. When obsidian breaks, the fractures are very sharp which is why it was used as tools in the Stone Age. Seventy percent of obsidian rock is made of silica. Obsidian can only form near active volcanoes.How old is obsidian rock?
Although most rocks that form in the Earth's crust are very old, obsidian is rarely older than 20 million years old which is young for a rock. It goes through a process called devitrification whereby it turns from glass to a rock.What is special about obsidian?
Obsidian is quite unique due to its smooth, uniform volcanic glass texture. Obsidian is usually considered an extrusive rock, because it usually solidifies above Earth's surface where the edges of a lava flow come into contact with cool air or water.Does obsidian break easily?
It has a hardness of about 5.5 which makes it easy to scratch. It also lacks toughness and is easily broken or chipped upon impact. These durability concerns make obsidian an inappropriate stone for rings and bracelets.How much does obsidian weight?
The density of obsidian is 2.55 g/cubic cm. It means it is heavier than water and dense medium as a mass.Interesting Obsidian Rock Facts
How strong is obsidian?
Obsidian is rated at 5 to 5.5 on the Mohs scale of mineral hardness, with diamond rated at 10, and talc rated at 1. It has very high tensile strength, but is also very brittle due to low compressive strength.Is obsidian toxic?
Is Obsidian Dangerous? While obsidian is powerful, it is not dangerous. The only potential; danger that comes from this particular stone is in its rough form because it can have very sharp edges. In the past it has been used for blades and heads of arrows, but beyond this it is a safe stone for the most part.Is Crying obsidian real?
Crying obsidian is a decorative block that is used to create respawn anchors. They appear like purple blocks and these blocks produce purple dripping particles as if it is "crying".What color is obsidian?
Though obsidian is typically jet-black in colour, the presence of hematite (iron oxide) produces red and brown varieties, and the inclusion of tiny gas bubbles may create a golden sheen. Other types with dark bands or mottling in gray, green, or yellow are also known.Can obsidian float on water?
Option B: Obsidian is a naturally occurring igneous glass formed by the rapid cooling of lava from volcanoes. It is black or dark greenish in color and is extremely rich in silica. Obsidian does not float on water.How many colors of obsidian are there?
Black is obsidian's most common color. It can be brown, tan, or green, though. Obsidian may rarely be blue, red, orange, or yellow. Obsidian with multicolored iridescence caused by inclusions of magnetite nanoparticles “caused mainly by trace elements or inclusions”.Is obsidian hard to break?
In reality, obsidian is easily broken by human action and can also be worn down by the weather. This would make it a terrible substance from which to build a fortress. While obsidian is not used to build indestructible walls or portals, it is used to make surgical tools.What are 3 facts about obsidian?
Interesting Obsidian Rock Facts:Obsidian is also known as "nature's glass" because of its glassy appearance. When obsidian breaks, the fractures are very sharp which is why it was used as tools in the Stone Age. Seventy percent of obsidian rock is made of silica. Obsidian can only form near active volcanoes.