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norman edwardwar
Joined: 22 Oct 2019
Posts: 2
Location: davos
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 Posted: Oct 23, 2019 02:47 Post subject: Glass or Obsidan....in Pink |
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Hi all
I am a newbie here as well as collecting minerals. Over the years I have seen some amazing crystal clusters etc. but could not afford them. Recently a friend who was an avid collector gave me some of his collection.
Amongst the lot was this piece which a dealer at a fair said was Obsidian. But is it, or is it just glass. I would really like to hear the expert opinions.
Thanks
| Mineral: | Obsidian? |
| Locality: | | Arvigo, Calanca Valley, Mesolcina Valley, Grischun (Grisons; Graubünden), Switzerland |  |
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| Dimensions: | 17 x 8cm high |
| Description: |
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| Viewed: |
642 Time(s) |
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| Description: |
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| Viewed: |
637 Time(s) |
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Tobi
Joined: 07 Apr 2009
Posts: 3149
Location: Good Old Germany
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| Posted: Oct 23, 2019 03:11 Post subject: Re: Glass or Obsidan....in Pink |
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Hi Norman,
quite sure this is man-made glass slag.
Regards
Tobi
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SteveB
Joined: 12 Oct 2015
Posts: 94
Location: Canberra
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| Posted: Oct 23, 2019 04:47 Post subject: Re: Glass or Obsidan....in Pink |
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| Fairly certain this is glass. "pink obsidian" appears to be a marketing name applied to many genuinely and dyed pink specimens of mostly manmade substances. Nothing about what I see says "natural" to me but it screams "glass".
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James Catmur
Site Admin
Joined: 14 Sep 2006
Posts: 650
Location: Cambridge
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| Posted: Oct 23, 2019 06:26 Post subject: Re: Glass or Obsidan....in Pink |
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| I vote for glass
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Pete Richards
Site Admin
Joined: 29 Dec 2008
Posts: 652
Location: Northeast Ohio
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| Posted: Oct 23, 2019 09:11 Post subject: Re: Glass or Obsidan....in Pink |
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In addition to the comments already posted, obsidian is a product of volcanic eruptions. Are there any volcanos in Graubünden? I don't think so.
_________________
Collecting and studying crystals with interesting habits, twinning, and epitaxy |
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norman edwardwar
Joined: 22 Oct 2019
Posts: 2
Location: davos
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| Posted: Oct 23, 2019 09:22 Post subject: Re: Glass or Obsidan....in Pink |
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Thank you all for looking.
As to Valcanos in Graubunden....the answer is No....but we do travel extensively 3 times a year and this friend , retired for 10 years, did just that and brought back some crazy stuff.
We do have a large community spread across the land who go mountain climbing, lots of them...mountains, and they have pulled out some whoppers.
Have a super weekend
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