Greetings Tila
I have got further information
here is what i was told from crystal expert
Now, a little tougher question, about the obsidian (specifically green or blue-green) that LOOKS like it is glass. I am attaching a picture of my blue-green obsidian. To the naked eye this looks like a
clear blue-green glass ball. However, upon closer examination one can see certain snowflake like markings, and other markings inside which distinguish it as NATURAL GLASS - ALSO KNOWN AS OBSIDIAN, AS OBSIDIAN IS NATURAL GLASS. Man made glass might have bubbles or other marks or be completely clear, but natural volcanic glass (obsidian) will have certain characteristics that identify it. These little snowflakes come from the long cooling process, and are probably little star shaped internal fractures.
Attached are some -not very good - photos of my piece. You can see the inclusions which look like starbursts, and other formations which happened when cooling. Manufactured glass does not get the starbursts. Even tho my photos are not good - there are NO BUBBLES in this piece. The last photo 7769, is not clear, but shows the starbursts - they look like little snowflakes. This piece was sold to me as obsidian, and has been confirmed by an expert that it is indeed - natural volcanic glass, otherwise known as obsidian.
So, for what it is worth, mother earth produces all kinds of beautiful miracles. How can anybody give a definitive answer on this. Some glass objects will be natural, and some man made. Mine is natural.
Never say "never"....one never knows what wonders exist!