West Coast Gem & Mineral Show: Fri 7th Nov to Sun 9th Nov: Santa Ana, CA
Welcome to the GemologyOnline.com Forum
A non-profit Forum for the exchange of gemological ideas
It is currently Sat Sep 20, 2014 7:56 am

All times are UTC - 4 hours




Post new topic Reply to topic  [ 16 posts ]  Go to page 1, 2  Next
Author Message
 Post subject: Inherited GIA equpment & specific gravity liquid
PostPosted: Mon Jan 21, 2013 12:50 pm 
Offline
New to the Forum or The Quiet Type

Joined: Sun Jan 20, 2013 11:04 pm
Posts: 9
Hi all,

I recently inherited my FIL's gemology equipment and specific gravity fluids. How can I tell if they can still be used? He took the GIA class and became a certified gemologist back in the 80's . I also got all of his books from the GIA with the coursework for colored stones, jewelry design, and diamonds I've got everything but the stones to practice on. The specific gravity set has 6 bottles and a small dark bottle of the RI 1.81 but I can't tell if there is anything left in that one, the others ones contain some fluid and there appears to be something black floating in each of the bottle. I read sometimes people put copper in the liquids but this doesn't appear to be that..

I'm now a proud owner of a duplex2 refractometer, gemometer, and polariscope As I am typing this i realized there is a built in light source for the polariscope, however when i turned the switch the bulb flickered and died. Guess I will have to figure out how to buy and change one. I also found some red and green film I dont' know if those are like a chelsea filter or not, does any one know.?

I just ordered a calcite dicroscope and uvlite from mineralab, oh and i have a hastings 10x loupe.

So.. now I need stones to practice with. Does any one know where I would get some. I have many rough stones for my jewelry and a few faceted topaz, garnet, and quartz.

Big question: my cousin bought a lot of jewelry from an auction in the 80's it was supposed to come from a jeweler, and underneath a bunch of cosmetic pieces, he found 10 or so little gold boxes with rubies in them in plastic. He also bought some on ebay but now he forgets which ones are which. Sooooooo. I offered to test them on my new/old equipment. I imagine these may be paste, synthetic, or poor quality. They are all faceted, oh except for the microscopic slivers he got on ebay :shock:

I've been reading about the inclusions found in the rubies from the gia course, and i have also gone thorugh the gem identification made easy and my head is now spinning :?

I plan on looking through my loupe first, and trying to use the equipment. I've been playing with the loupe with some other stones that I know what they are, but of course I am an Beginner anxious to learn. Correct me if I'm wrong, but do I need to have I methylene iodine to test with the polariscope?

Any suggestions on the best way to test these. he has quite a few and I looked up the apprasials services and he cannot afford one of these for all of them, especially since we are assuming glass or less. If I can narrow it down , then I guess he can take it to someone for a more detailed account. Oh, I am sorry for this very long winded intro..

I'm excited to join this forum and learn from all of you . I'm a librarian by trade so the more I read the merrier I get.
Thanks so much for any help you can give me

Mer...


Share on FacebookShare on Twitter
Top
 Profile  
 
 Post subject: Re: Inherited GIA equpment & specific gravity liquid
PostPosted: Mon Jan 21, 2013 1:04 pm 
Offline
Site Admin
User avatar

Joined: Sun Oct 16, 2005 12:22 pm
Posts: 14579
Location: San Francisco
The easiest way to insure your instruments are working properly is to test gems you positively know the identity of.


Share on FacebookShare on Twitter
Top
 Profile  
 
 Post subject: Re: Inherited GIA equpment & specific gravity liquid
PostPosted: Mon Jan 21, 2013 2:42 pm 
Offline
New to the Forum or The Quiet Type

Joined: Sun Jan 20, 2013 11:04 pm
Posts: 9
Thanks Barbra, fair enough. I know I have glass, and assuming my favorite stone dealer sticks by her guarantee, I have some stones made into beads like amber, lemon quartz, turquoise, and rough ruby.

Mer


Share on FacebookShare on Twitter
Top
 Profile  
 
 Post subject: Re: Inherited GIA equpment & specific gravity liquid
PostPosted: Mon Jan 21, 2013 4:22 pm 
Offline
Site Admin
User avatar

Joined: Sun Oct 16, 2005 12:22 pm
Posts: 14579
Location: San Francisco
Shameless plug:
http://store.gemologyonline.com/marketp ... .php?id=12


Share on FacebookShare on Twitter
Top
 Profile  
 
 Post subject: Re: Inherited GIA equpment & specific gravity liquid
PostPosted: Mon Jan 21, 2013 4:57 pm 
Offline
New to the Forum or The Quiet Type

Joined: Sun Jan 20, 2013 11:04 pm
Posts: 9
:shock: I'm shocked I say. :) The study stones sound just what I need to go through the coursework, but been spending money like wild these last few days well off to buy the refractive fluid adn then make up my mind. Do you think I need that to identify your stones??
Barbra Voltaire wrote:


was just outside looking at some topaz and labradorite under the loupe...


Share on FacebookShare on Twitter
Top
 Profile  
 
 Post subject: Re: Inherited GIA equpment & specific gravity liquid
PostPosted: Mon Jan 21, 2013 7:28 pm 
Offline
Site Admin
User avatar

Joined: Sun Oct 16, 2005 12:22 pm
Posts: 14579
Location: San Francisco
Quote:
Do you think I need that to identify your stones??


The stones have already been identified.....you can use them to insure your instruments are properly calibrated.


Share on FacebookShare on Twitter
Top
 Profile  
 
 Post subject: Re: Inherited GIA equpment & specific gravity liquid
PostPosted: Tue Jan 22, 2013 10:15 am 
Offline
Site Admin
User avatar

Joined: Fri May 12, 2006 11:24 am
Posts: 7126
Location: Rome, Italy
Barbra Voltaire wrote:
Quote:
Do you think I need that to identify your stones??


The stones have already been identified.....you can use them to insure your instruments are properly calibrated.


i'd add that having educational stones CERTAINLY identified is a good way of start..... :wink:

ciao
alberto

_________________
GemmoRaman-532


Share on FacebookShare on Twitter
Top
 Profile  
 
 Post subject: Re: Inherited GIA equpment & specific gravity liquid
PostPosted: Tue Jan 22, 2013 1:56 pm 
Offline
Gemology Online Veteran

Joined: Mon May 14, 2007 11:00 am
Posts: 842
Location: Monterey, CA
Barbra Voltaire wrote:

Shameless Plug II, Get my book "Guide to Affordable Gemology" at Pretty Rock.com or Mineralab.


Share on FacebookShare on Twitter
Top
 Profile  
 
 Post subject: Re: Inherited GIA equpment & specific gravity liquid
PostPosted: Tue Jan 22, 2013 7:31 pm 
Offline
New to the Forum or The Quiet Type

Joined: Sun Jan 20, 2013 11:04 pm
Posts: 9
Bill Hanneman wrote:
Barbra Voltaire wrote:

Shameless Plug II, Get my book "Guide to Affordable Gemology" at Pretty Rock.com or Mineralab.


Bill, I'll check it out. I already have quite a few gemology books, but one can never have too many..

Barbra, I ordered the study stones and having gone outside to see about the RI liquid that has to be 25 years old, there is still liquid but it looks really mucky.. lots of floating UFO's so I went ahead and ordered another bottle.

How, forgive the stupid question, but I recognize almost all of these stones, and as they are not mystery stones (well one is but i have a guess) I will be able to use my equipment, but if they are off a bit, can they be calibrated??

Thanks

Mer


Share on FacebookShare on Twitter
Top
 Profile  
 
 Post subject: Re: Inherited GIA equpment & specific gravity liquid
PostPosted: Tue Jan 22, 2013 10:19 pm 
Offline
Site Admin
User avatar

Joined: Sun Oct 16, 2005 12:22 pm
Posts: 14579
Location: San Francisco
All the gems in my collection are clearly identified......except for the :-k mystery stone.

It will NOT be what it appears to be....therefore, you'll need to be able to interpret the results of your instruments to identify it.

Actually, even with "floaters" RI liquid often still works. Try it before you toss it out.


Share on FacebookShare on Twitter
Top
 Profile  
 
 Post subject: Re: Inherited GIA equpment & specific gravity liquid
PostPosted: Wed Jan 23, 2013 1:23 am 
Offline
Gemology Online Veteran

Joined: Mon May 14, 2007 11:00 am
Posts: 842
Location: Monterey, CA
Barbra Voltaire wrote:
The easiest way to insure your instruments are working properly is to test gems you positively know the identity of.

That will not work for checking your refractometer. Due to isomorphic substitution, you have to have precise values. Check it out using quartz and synthetic spinel and see if both the RI and the birefringence values are correct. If not, you can probably figure out a correction factor.



Share on FacebookShare on Twitter
Top
 Profile  
 
 Post subject: Re: Inherited GIA equpment & specific gravity liquid
PostPosted: Wed Jan 23, 2013 6:37 am 
Offline
Valued Contributor
User avatar

Joined: Tue Oct 20, 2009 3:34 pm
Posts: 383
Location: Sweden
Bill Hanneman wrote:
Barbra Voltaire wrote:
The easiest way to insure your instruments are working properly is to test gems you positively know the identity of.

That will not work for checking your refractometer. Due to isomorphic substitution, you have to have precise values. Check it out using quartz and synthetic spinel and see if both the RI and the birefringence values are correct. If not, you can probably figure out a correction factor.



2 questions from an almost newbie:

Why quartz and synthetic spinel?
And how do I separate spinel from synthetic spinel, to be sure I test the right thing?
(and yes! I DO have your book, Dr Hanneman, and like it alot, but I can´t remember I have read anywhere how to separate synthetic spinel from spinel? But I do have a short memory... :-))

_________________
~~~Lennie~~~


Share on FacebookShare on Twitter
Top
 Profile  
 
 Post subject: Re: Inherited GIA equpment & specific gravity liquid
PostPosted: Wed Jan 23, 2013 11:14 am 
Offline
Site Admin
User avatar

Joined: Sun Oct 16, 2005 12:22 pm
Posts: 14579
Location: San Francisco
The stones that I've supplied are reading diagnostic refractive indices.

Quartz and flame fusion synthetic spinel have reliably consistant refractive indices. They are cheap and readily available.
I guess they could be described as "stones you positively know the identity of". :roll:


Share on FacebookShare on Twitter
Top
 Profile  
 
 Post subject: Re: Inherited GIA equpment & specific gravity liquid
PostPosted: Wed Jan 23, 2013 12:27 pm 
Offline
New to the Forum or The Quiet Type

Joined: Sun Jan 20, 2013 11:04 pm
Posts: 9
Thanks all.

I guess I'll just wait until I get the stones and test them. What I was trying to find out, if I don't get the readings I should, does this mean my equipment could be broken? Can they be calibrated ?

Hopefully I'll ask clearer questions once I use my new/old equipment. Right now I know I'm not sure what questions to even ask.

Lots of wonderful information in this forum. I'm so glad I joined.

Mer


Share on FacebookShare on Twitter
Top
 Profile  
 
 Post subject: Re: Inherited GIA equpment & specific gravity liquid
PostPosted: Wed Jan 23, 2013 1:38 pm 
Offline
Valued Contributor
User avatar

Joined: Mon Dec 24, 2012 5:16 pm
Posts: 213
Location: Austin, Texas
Bill Hanneman wrote:
Barbra Voltaire wrote:

Shameless Plug II, Get my book "Guide to Affordable Gemology" at Pretty Rock.com or Mineralab.



I would love to get your book, but do not see it listed at prettyrock or mineralab for some reason.

-Wayne

_________________
"Distracted by something shiny."

Wayne Wilson


Share on FacebookShare on Twitter
Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 16 posts ]  Go to page 1, 2  Next

All times are UTC - 4 hours


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
Gemology Style ported to phpBB3 by Christian Bullock