Previous in Forum: Finitos   Next in Forum: Heat Treating Wood...Humble Pie.
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
3 comments
Rate Comments: Nested
emeryfriend
Participant

Join Date: Oct 2010
Location: Wasilla, Alaska
Posts: 3

Old Emery

10/22/2010 1:07 AM

Years ago an old timer took some black sand I had and wet it with water and then drained it. He then took and dropped a few drops of this clear odorless liquid which then spread quickly like gasoline and instantly cleaned and exposed the gold. Any idea what that was?
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Mikerho
Guru
Hobbies - Musician - Engineering Fields - Chemical Engineering - New Member Engineering Fields - Control Engineering - New Member Engineering Fields - Instrumentation Engineering - New Member

Join Date: Jan 2007
Location: Moses Lake, WA, USA, Thulcandra - The Silent Planet (C.S. Lewis)
Posts: 4216
Good Answers: 194
#1

Re: Old Emery

10/22/2010 11:23 AM

Magic?

__________________
 "Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone." - Ayn Rand
Register to Reply
JohnDG
Guru
United Kingdom - Member - Not a New Member Hobbies - Musician - New Member Hobbies - Fishing - New Member

Join Date: May 2006
Location: Reading, Berkshire, UK. Going under cover.
Posts: 9684
Good Answers: 468
#2

Re: Old Emery

10/22/2010 11:47 AM

Snake oil.

__________________
 "Love justice, you who rule the world" - Dante Alighieri
Register to Reply
mike k
Guru
Hobbies - DIY Welding - New Member

Join Date: Apr 2008
Location: Bristol, Tennessee
Posts: 1177
Good Answers: 58
#3

Re: Old Emery

10/26/2010 9:28 PM

Manganese can deposit on some things, like the way a pearl is made. Sulfuric acid or the like might be used to remove it. It's not my field, but I did work for a factory that processed manganese nodules, and they used acid in the process.

The black manganese nodules were from Hawaiian waters, not far from you in Alaska.

__________________
 mike k
Register to Reply
Register to Reply
Have a Different Question?
3 comments
Copy to Clipboard

Users who posted comments:

JohnDG (1); mike k (1); Mikerho (1)

Previous in Forum: Finitos   Next in Forum: Heat Treating Wood...Humble Pie.

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
General Discussion:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (59 right now)
Show Members
Advertisement