January 24 Through February 4—TUCSON, ARIZONA: Annual show
Welcome to the GemologyOnline.com Forum
A non-profit Forum for the exchange of gemological ideas
It is currently Thu Mar 28, 2024 12:06 pm

All times are UTC - 4 hours




Post new topic Reply to topic  [ 7 posts ] 
Author Message
 Post subject: Identifying Doubling
PostPosted: Sun Feb 24, 2019 9:01 pm 
Offline
New to the Forum or The Quiet Type

Joined: Thu Nov 16, 2017 11:31 am
Posts: 8
So I'm having trouble figuring out how to recognize doubling when looking through magnification.

I've obtained picture that shows doubling, but can someone point out exactly where the doubling occurs in the in the image?

It looks like a triangular facet, but I'm not sure exactly what I'm looking for in the image to identify the doubling.

[img]
Attachment:
Dobling%20Example.PNG
[/img]


Attachments:
Dobling Example.PNG
Dobling Example.PNG [ 300.06 KiB | Viewed 2627 times ]
Top
 Profile  
Reply with quote  
 Post subject: Re: Identifying Doubling
PostPosted: Sun Feb 24, 2019 10:45 pm 
Offline
Gold Member

Joined: Thu May 12, 2016 2:18 am
Posts: 1542
All of the facet junctions are doubled in this image. Look for parallel lines close together, and dark/lite areas with the same shape looking like they overlap. Find a similar picture of a CZ or Diamond and I think the difference will become clear.


Top
 Profile  
Reply with quote  
 Post subject: Re: Identifying Doubling
PostPosted: Sun Feb 24, 2019 11:17 pm 
Offline
Site Admin
User avatar

Joined: Sun Oct 16, 2005 12:22 pm
Posts: 21602
Location: San Francisco
Hi bretb.
Your picture isn't clear.
Look at this one: a bit better....especially the double culet.
Image

Try identifying doubling of facets with easier material.
Peridot lily pads:
Image

Zircon:
Image


Top
 Profile  
Reply with quote  
 Post subject: Re: Identifying Doubling
PostPosted: Tue Feb 26, 2019 8:00 pm 
Offline
New to the Forum or The Quiet Type

Joined: Thu Nov 16, 2017 11:31 am
Posts: 8
Ok, I think I have a better idea at what I'm looking at.


Top
 Profile  
Reply with quote  
 Post subject: Re: Identifying Doubling
PostPosted: Tue Feb 26, 2019 8:08 pm 
Offline
Site Admin
User avatar

Joined: Sun Oct 16, 2005 12:22 pm
Posts: 21602
Location: San Francisco
Were you ever able to see the doubling in the moissanite?


Top
 Profile  
Reply with quote  
 Post subject: Re: Identifying Doubling
PostPosted: Wed Feb 27, 2019 1:37 am 
Offline
Valued Contributor
User avatar

Joined: Wed Nov 12, 2014 4:12 am
Posts: 102
Yes first photo, Moissanite has double faceting, but mostly visible in the center.


Top
 Profile  
Reply with quote  
 Post subject: Re: Identifying Doubling
PostPosted: Mon Jul 06, 2020 8:00 am 
Offline
Gemology Online Veteran
User avatar

Joined: Wed Dec 30, 2009 11:44 am
Posts: 525
Location: PAKISTAN-Peshawar
Hello folks,
I want to share a video about the doubling of pavilion back facets. It is easy and understandable. I hope you will like it.



with best regards

HUK

_________________
Gemology for everyone.
HUK


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 7 posts ] 

All times are UTC - 4 hours


Who is online

Users browsing this forum: No registered users and 13 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