Naked Science Forum

Non Life Sciences => Geology, Palaeontology & Archaeology => Topic started by: dragan986 on 13/04/2015 17:04:13

Title: need help identifying this "rock"
Post by: dragan986 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 [:)]

Title: Re: need help identifying this "rock"
Post by: Bill S 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?

Title: Re: need help identifying this "rock"
Post by: Bass 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.

Title: Re: need help identifying this "rock"
Post by: dragan986 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