geologists- Green obsidian, found along Croatian Coast!!!

What's going on here??? Anyone knows?

5*s
Very interesting.
My first thought was Thermophiles, but the 2nd one that they are found for example around Black Smokers or in Hot Springs but not in Lava itself.

Chemical Reaction due to special composition of Gases etc. in the Lava ?

Anyway, looks beautiful, would make a nice green Obsidian Knife or Arrow tips.

Last Edited by Trickster on 05/22/2013 09:14 AM

That looks cool but superman better watch out. :)

This has to be from an active volcano in near coast!

There is a related old post about chickens laying green eggs. That chicken must have gotten a bit of whatever turned this obsidian green.

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When it comes to minerals it can literally be a PPM scale that influences the color, look at sapphires and rubies, same mineral "Corundum" different color.

They would need to hit it with an XRF to find out what colored it


On a side note there are tons of old iron furnaces around here "The giant stone ones" and man made obsidian (The slag) is everywhere in the creeks. From bright blues, greens, to dark purples...

Sorry forgot to sign in

ok it can be man made... but apearing along the croatian coast?

"Moldovite" is a green glass, that comes from outer space. It is found all along the Moldovanian coast and other slav nations.

Excuse me for talking BS, just came from the morning shift when I wrote it (the talk about green obsidian, which exists no question, but not about the possibility of a nearby Volcano (extinct or sleeping).

A with this.

Last Edited by Trickster on 05/22/2013 12:42 PM

I never meant from my statement to be taken as "it can be man made" just the part, that only a ppm scale change is needed for color to change in minerals.

Green beeches exist... those which usually involve olivine *Hawaii* as an example...Green obsidian *naturally occurring from a volcanic source* is quite rare...I have personally not heard of an occurrence of this. *But my BS in Geology can only go so far.*

meteorite??

no

Libyan glass??