What's This? #35, Can You Identify This? |
Colorado Prospector - Gem and mineral prospecting and mining forums > Prospecting, Mineral Collecting and Treasure Hunting Forums > Prospectors and Rockhounding Field Work  |
What's This? #35, Can You Identify This? |
  Jun 9 2010, 02:22 PM
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#1
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 Master Mucker!  Group: Admin Posts: 7,187 Joined: 7-October 03 From: Colorado Member No.: 4  |
Here is a nice specimen of something we all see alot of out there in the field.
 Can anyone tell me what this is?
-------------------- Education is the key to the future,
and participation opens the door to opportunity. Discover your prospecting independence & success! ColoradoProspector.com Owner/Webmaster Core team member ♥  |
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Jun 9 2010, 03:50 PM
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#2
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Rock Bar! Group: Members Posts: 411 Joined: 20-February 07 From: Richland Mississippi Member No.: 994 |
Looks like book mica to me.
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Jun 9 2010, 04:37 PM
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#3
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 Shovel Buster! Group: Members Posts: 78 Joined: 30-June 08 From: Southwest,Oklahoma Member No.: 5,617 |
slate...my final answer.
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Jun 11 2010, 07:03 AM
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#4
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 Master Mucker! Group: Admin Posts: 4,149 Joined: 7-October 03 From: Colorado Member No.: 3 |
Good try Jon, I could see how you thought that from the pic.
Actually Jim's got it right, it is mica, a very large, dark book out of Lake George Colorado.  CP -------------------- CP-Owner/Administrator
www.ColoradoProspector.com IF YOU USE IT, THE GROUND PRODUCED IT! MINERS MAKE "IT" HAPPEN!! |
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Jun 12 2010, 05:51 AM
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#5
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Master Mucker! Group: Admin Posts: 7,187 Joined: 7-October 03 From: Colorado Member No.: 4 |
Ahhhhhhh, a leaverite most of you are thinking right.
 But who can tell me one of its main uses? 
-------------------- Education is the key to the future,
and participation opens the door to opportunity. Discover your prospecting independence & success! ColoradoProspector.com Owner/Webmaster Core team member ♥ |
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Jun 14 2010, 06:55 AM
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#6
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 Master Mucker Group: Members Posts: 1,439 Joined: 22-February 04 Member No.: 98 |
Mica is used as an insulating material in electronics. Particularly with capacitors, back in the "old days" it was used as a static shield for USAF radar systems at low-risk sites (more like low value, in the event of an atomic/nuclear exchange). It was/is also used in rectifiers as well as variable resistors.
-------------------- Today's socio-political climate is rock solid proof that Adam and Eve weren't prospectors.
If they were they'd have eaten the snake instead of the apple and we'd still be in heaven.... |
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Jun 16 2010, 06:00 AM
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#7
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Master Mucker! Group: Admin Posts: 7,187 Joined: 7-October 03 From: Colorado Member No.: 4 |
 Good job Carl!
-------------------- Education is the key to the future,
and participation opens the door to opportunity. Discover your prospecting independence & success! ColoradoProspector.com Owner/Webmaster Core team member ♥ |
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Jun 17 2010, 07:48 AM
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#8
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Master Mucker Group: Members Posts: 1,439 Joined: 22-February 04 Member No.: 98 |
Thanks, Denise!
Also, mica is also used for regular insulation, typically in commercial facilities. -------------------- Today's socio-political climate is rock solid proof that Adam and Eve weren't prospectors.
If they were they'd have eaten the snake instead of the apple and we'd still be in heaven.... |
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Jul 1 2010, 06:21 AM
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#9
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Master Mucker! Group: Admin Posts: 7,187 Joined: 7-October 03 From: Colorado Member No.: 4 |
Many uses for Mica! Here is another look at a sample of Colorado Muscovite (mica) in quartz. There are many different varieties in the Mica group.
-------------------- Education is the key to the future,
and participation opens the door to opportunity. Discover your prospecting independence & success! ColoradoProspector.com Owner/Webmaster Core team member ♥ |
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Jul 1 2010, 08:41 AM
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#10
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Diggin' In! Group: Members Posts: 28 Joined: 26-June 10 From: Littleton Member No.: 7,292 |
Heard long ago that mica uas used for oven windows before high temp glass was around.
-------------------- A bachelor's life is a fine breakfast, a flat lunch, and a miserable dinner. Francis Bacon
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Jul 1 2010, 08:15 PM
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#11
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Master Mucker! Group: Admin Posts: 4,149 Joined: 7-October 03 From: Colorado Member No.: 3 |
Yes it was used for oven windows and woodstoves in the old days as mica is one of the best insulators known to keep heat on one side. The mica is still very widely used for just that in electronics as Carl said too.....although they are very thin layers used (normally not seen after assembly) to sheild heat from traveling from heat sinks through to the mountings....ie pc board or housings/framework.
Good job everyone! CP -------------------- CP-Owner/Administrator
www.ColoradoProspector.com IF YOU USE IT, THE GROUND PRODUCED IT! MINERS MAKE "IT" HAPPEN!! |
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