New Mineral Named After GIA’s John Koivula
Welcome to the GemologyOnline.com Forum
A non-profit Forum for the exchange of gemological ideas
It is currently Mon Oct 14, 2019 9:46 am

All times are UTC - 4 hours




Post new topic Reply to topic  [ 32 posts ]  Go to page Previous  1, 2, 3
Author Message
 Post subject: Re: Use of polariscope in Gem ID course?
PostPosted: Thu Mar 21, 2019 2:35 pm 
Offline
Valued Contributor

Joined: Sun Mar 11, 2007 10:03 pm
Posts: 255
Location: San Diego
Barbra Voltaire wrote:
Quote:
A separate monochromatic light is required as well.

Or a filter.
All refractometers made by Wildman, Kruss and Eickhorst come with monochromatic filters.
I find them far superior to the ones made by GIA (sorry). I own all 3. My GIA refractometer was given away years ago.

http://www.gemproducts.com/refractometer.html


No need to be sorry :)

I have used many others and actually own a couple of those you mention which I find very useful for specific purposes. The one area that I definitely prefer the GIA model for is spot readings, especially for students as the larger hemicylinder, removable magnification and ability to use white light allow for easier viewing of the spot.

I find filters to be an excellent option for monochromatic as long as the light source is strong enough.

_________________
Paul Mattlin
Manager, Gemology Distance Education

* My posts are my own and do not reflect the opinions or policies of my employer


Top
 Profile  
Reply with quote  
 Post subject: Re: Use of polariscope in Gem ID course?
PostPosted: Fri May 24, 2019 12:18 am 
Offline
New to the Forum or The Quiet Type

Joined: Thu May 23, 2019 1:33 am
Posts: 1
Great information.Thanks for sharing this great post =D>


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 32 posts ]  Go to page Previous  1, 2, 3

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