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Author Topic: need help identifying this "rock"  (Read 1886 times)

Offline dragan986

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need help identifying this "rock"
« on: 13/04/2015 17:04:13 »
i found this strange looking "rock". it looks interesting, so i would like to know what it is.  :) if someone know :)

« Last Edit: 13/04/2015 17:06:12 by dragan986 »


 

Offline Bill S

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Re: need help identifying this "rock"
« Reply #1 on: 14/04/2015 12:50:31 »
Hi Dragan, welcome.

How hard is it? Can you, for example, scratch it with a good quality knife blade?
 

Offline Bass

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Re: need help identifying this "rock"
« Reply #2 on: 15/04/2015 02:37:03 »
Conchoidal fracture suggest this is either chalcedony- microcrystalline quartz-  (agate, opal, jasper) or glass. My vote is for chalcedony- which you shouldn't be able to scratch with a knife.
 

Offline dragan986

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Re: need help identifying this "rock"
« Reply #3 on: 15/04/2015 16:24:51 »
Its very hard to scrach, it looks like glass, its transparent, but inside is something brownish.
P.S. Sorry for bad english
 

The Naked Scientists Forum

Re: need help identifying this "rock"
« Reply #3 on: 15/04/2015 16:24:51 »

 

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