Does obsidian have air bubbles in it?
Obsidian can contain small bubbles of air that are aligned along layers created as the molten rock was flowing just before being cooled. These bubbles can produce interesting effects such as a golden sheen, known as Sheen Obsidian or a rainbow sheen called Rainbow Obsidian.
How can you tell the difference between glass and obsidian?
Obsidian has a glassy lustre and is slightly harder than window glass. 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.
Does Blue obsidian have bubbles?
But what is blue obsidian made of? It’s not entirely clear why some rare forms of obsidian come out electrically blue, though the best guess seems to be that it is gas bubbles that are present within the lava at the time of cooling.
Does obsidian have a streak?
The streak of obsidian is white, but various colors occur in nature. Frequently found colors of Obsidian rocks are: The highest occurrence of obsidians is in Black, but it also available in Brown, Green, or Tan.
Is there fake obsidian?
Obsidian. This can be a particularly insipid fake; true Obsidian is volcanic glass, which is obviously quite similar to man-made glass, both in appearance and composition. Some pieces are easy to identify as fakes – primarily due to their clarity. Fake Black Obsidian is very hard to identify, unfortunately.
Is Red obsidian real?
Black is the most common color of obsidian. However, it can also be brown, tan, or green. Rarely, obsidian can be blue, red, orange, or yellow. The colors are thought to be caused mainly by trace elements or inclusions.
Is rainbow obsidian real?
Rainbow obsidian is a type of obsidian or volcanic glass. It grows from felsic lava, and unlike other minerals, it is not formed over millions of years. Rather, it forms just as quickly as the felsic lava cools.