The Naked Scientists

The Naked Scientists Forum

Author Topic: What Kind of Rock is this?  (Read 3707 times)

Offline fandu

  • First timers
  • *
  • Posts: 2
    • View Profile
What Kind of Rock is this?
« on: 05/08/2009 03:29:06 »
Found this rock in the backyard, just curious to what kind it is.



 

Offline JimBob

  • Global Moderator
  • Neilep Level Member
  • *****
  • Posts: 6564
  • Thanked: 7 times
  • Moderator
    • View Profile
What Kind of Rock is this?
« Reply #1 on: 05/08/2009 04:25:12 »
looks at first glance like quartz. But it could be plagioclase feldspar. The only real crystal surfaces I can see are in the upper left part and it looks like quartz.
 

Offline Bass

  • Neilep Level Member
  • ******
  • Posts: 1338
  • Thanked: 5 times
    • View Profile
What Kind of Rock is this?
« Reply #2 on: 05/08/2009 16:37:07 »
I agree, photo looks like quartz.  Can you give us any more information?  Can you scratch it with a knife? Where it's broken, is the break an irregular surface, or a flat surface?  Is the pink/red color just along fractures?
 

Offline Karen W.

  • Moderator
  • Naked Science Forum GOD!
  • *****
  • Posts: 31653
  • Thanked: 5 times
  • "come fly with me"
    • View Profile
What Kind of Rock is this?
« Reply #3 on: 05/08/2009 16:53:07 »
Found this rock in the backyard, just curious to what kind it is.


IT HAS A PRETTY AMETHYST COLOR UP TOP SIDE WAY...
 

Offline fandu

  • First timers
  • *
  • Posts: 2
    • View Profile
What Kind of Rock is this?
« Reply #4 on: 07/08/2009 01:04:35 »
It will not scratch with a knife, and I pressed down pretty hard. It has an irregular surface on one side and almost flat on the other.
 

Offline JimBob

  • Global Moderator
  • Neilep Level Member
  • *****
  • Posts: 6564
  • Thanked: 7 times
  • Moderator
    • View Profile
What Kind of Rock is this?
« Reply #5 on: 07/08/2009 04:12:09 »
Actually, Karen, I think the color needs to be adjusted on your computer. It is probably rose quartz and probably from a pegmatite.
 

Offline Bass

  • Neilep Level Member
  • ******
  • Posts: 1338
  • Thanked: 5 times
    • View Profile
What Kind of Rock is this?
« Reply #6 on: 07/08/2009 04:25:06 »
It will not scratch with a knife, and I pressed down pretty hard. It has an irregular surface on one side and almost flat on the other.

quartz it is then.
 

The Naked Scientists Forum

What Kind of Rock is this?
« Reply #6 on: 07/08/2009 04:25:06 »

 

SMF 2.0.10 | SMF © 2015, Simple Machines
SMFAds for Free Forums