National Shutdowns have put the lid on most shows.
Welcome to the GemologyOnline.com Forum
A non-profit Forum for the exchange of gemological ideas
It is currently Fri Sep 25, 2020 3:41 pm

All times are UTC - 4 hours




Post new topic Reply to topic  [ 8 posts ] 
Author Message
 Post subject: What is your reference source(s) of choice?
PostPosted: Mon Jul 27, 2020 5:20 pm 
Offline
Established Member

Joined: Mon Aug 19, 2019 2:30 am
Posts: 31
I'm trying my hand at identifying some gem gravel. Having gathered info/readings from my equipment, I was going to check it against some reference material.

Currently I bounce between, gemologyproject, mindat.org/gemdat.org, dominy's handbook of gemology, the gemology tools program, and wikipedia.

My newbie question, is do you all have a reference source of choice (or multiple) that you refer to? As a newbie, I'd love to have a one-stop shop of "big book of gemology" with info on gem readings with dichroscope, refractometer, polariscope, absorbtion spectrum, magnetism, etc.

Thank you for any help :)


Top
 Profile  
Reply with quote  
 Post subject: Re: What is your reference source(s) of choice?
PostPosted: Mon Jul 27, 2020 6:01 pm 
Offline
Gemology Online Veteran

Joined: Thu May 12, 2016 2:18 am
Posts: 931
Books are good, but everything you want is easier with Gemology Tools Professional Software.

https://www.gemologytools.com/


Top
 Profile  
Reply with quote  
 Post subject: Re: What is your reference source(s) of choice?
PostPosted: Tue Jul 28, 2020 12:34 pm 
Offline
Site Admin
User avatar

Joined: Sun Oct 16, 2005 12:22 pm
Posts: 20376
Location: San Francisco
I believe you have almost all the tools at your disposal (you have a microscope too, right?)....specific gravity can be another bit of data to help eliminate possibilities.

I have found over the years that routine works best for me with Gem ID.
Each test eliminates possibilities.

Polariscope...see if you can get an interference figure
Refractometer
Magnetic Reaction
Specific Gravity
Hand Held spectroscope
UV light
Microscope

I leave the microscope for the last clue because I find that if you start with a sight ID, the rest of your tests are tainted to agree with your original ID....which can be very wrong.

The GIA advises one to start with a microscope; The DGemG advises against it. The German approach suits me.


Top
 Profile  
Reply with quote  
 Post subject: Re: What is your reference source(s) of choice?
PostPosted: Tue Jul 28, 2020 6:56 pm 
Offline
Established Member

Joined: Mon Aug 19, 2019 2:30 am
Posts: 31
1bwana1 wrote:
Books are good, but everything you want is easier with Gemology Tools Professional Software.

https://www.gemologytools.com/


Got that! And found it to be quite comprehensive.

Barbra Voltaire, FGG wrote:
I believe you have almost all the tools at your disposal (you have a microscope too, right?)....specific gravity can be another bit of data to help eliminate possibilities.

I have found over the years that routine works best for me with Gem ID.
Each test eliminates possibilities.

Polariscope...see if you can get an interference figure
Refractometer
Magnetic Reaction
Specific Gravity
Hand Held spectroscope
UV light
Microscope

I leave the microscope for the last clue because I find that if you start with a sight ID, the rest of your tests are tainted to agree with your original ID....which can be very wrong.

The GIA advises one to start with a microscope; The DGemG advises against it. The German approach suits me.


Yes on the microscope! And also an SG setup, which I had neglected to mention. And I appreciate the note on reserving the microscope for the end. I'm trying to train myself to be less swayed by initial 'gut impulses' from sight.


Top
 Profile  
Reply with quote  
 Post subject: Re: What is your reference source(s) of choice?
PostPosted: Tue Jul 28, 2020 8:02 pm 
Offline
Site Admin
User avatar

Joined: Sun Oct 16, 2005 12:22 pm
Posts: 20376
Location: San Francisco
I have witnessed many folks (usually GGs) who base their identifications solely on microscopic observation. Sometimes these observations are correct, but often they are wrong ....seriously wrong!

Since a gemologist's reputation is based on correctly identifying gems, treatments and synthetics, I find it wise to slow my roll and be sure before I open my mouth.

It is also totally acceptable to admit your testing was inconclusive. Better than being wrong.
:wink:


Top
 Profile  
Reply with quote  
 Post subject: Re: What is your reference source(s) of choice?
PostPosted: Tue Jul 28, 2020 8:21 pm 
Offline
Established Member

Joined: Mon Aug 19, 2019 2:30 am
Posts: 31
Ha! In that case, I will consider myself deeply gifted in having incredible doubt in my abilities!

"Based on my analysis, and with the caveat that I am an idiot, I have determined that there is a tiny possibility that this stone is an X. But don't quote me on that."


Top
 Profile  
Reply with quote  
 Post subject: Re: What is your reference source(s) of choice?
PostPosted: Tue Jul 28, 2020 9:03 pm 
Offline
Site Admin
User avatar

Joined: Sun Oct 16, 2005 12:22 pm
Posts: 20376
Location: San Francisco
Don't underestimate yourself.
I was impressed with your 6th sense for gemstones.....just done forget about why you spent a fortune on instruments and references.......so you could use them.


Top
 Profile  
Reply with quote  
 Post subject: Re: What is your reference source(s) of choice?
PostPosted: Wed Jul 29, 2020 11:44 am 
Offline
Established Member

Joined: Mon Aug 19, 2019 2:30 am
Posts: 31
Absolutely. Thanks for the word :)


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 8 posts ] 

All times are UTC - 4 hours


Who is online

Users browsing this forum: No registered users and 3 guests


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