User Tag List

Informational! Informational!:  0
Likes Likes:  0
Page 2 of 2 FirstFirst 12
Results 9 to 13 of 13

Thread: Unknown rock.

  1. #9
    Nepenthesian Nepfreak's Avatar
    Join Date
    Aug 2007
    Location
    MA, USA
    Posts
    768
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    pure quartz, smoky quartz. The top looks like some kind of volcanic rock that went matamorphic.

  2. #10
    herenorthere's Avatar
    Join Date
    Feb 2003
    Location
    almost Hartford
    Posts
    3,785
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    It doesn't look at all like quartz in that last photo.

    Can you scratch the "white" part with a knife? If so, can you scratch it with a penny? If you can scratch it with a knife, scrape a little bit off and put some white vinegar on it. Does it fizz? Try the same with the "red" part.
    Bruce in CT

    Madness is something rare in individuals but in groups, parties, peoples, ages it is the rule. Friedrich Nietzsche

  3. #11
    Jayson16's Avatar
    Join Date
    Oct 2006
    Location
    Canandaigua,New York
    Posts
    840
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Sorry for responding so late. I doesnt scratch with a penny but it does with a knife. Nothing fizzes either.

  4. #12
    herenorthere's Avatar
    Join Date
    Feb 2003
    Location
    almost Hartford
    Posts
    3,785
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I keep my mineralogy book at work, but I'll try to remember to bring it home this week.
    Bruce in CT

    Madness is something rare in individuals but in groups, parties, peoples, ages it is the rule. Friedrich Nietzsche

  5. #13
    Moderator Schmoderator Fluorescent fluorite, England PlantAKiss's Avatar
    Join Date
    Aug 2001
    Location
    Richmond, Virginia/Zone 7
    Posts
    10,335
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    They have a salt industry in the Bahamas.

    It looks more like a "soft" rock to me. You don't normally see quartz with that type of crystal pattern and cleavage. It looks like compressed columnar crystals.

    Its not quartz if a knife scratches it. Is is soft enough to be scraped into a powder? Got a black light around?

    If I can download your pics, I'll try to send it to one our expert rock guys.
    "Fox terriers are born with about four times as much original sin in them as other dogs." - Jerome K. Jerome

Page 2 of 2 FirstFirst 12

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •