Coming Soon!!! Gem Identification Instrument Give-Away. Donated by W.Wm.Hanneman
Welcome to the GemologyOnline.com Forum
A non-profit Forum for the exchange of gemological ideas
It is currently Sun Feb 17, 2019 4:33 pm

All times are UTC - 4 hours




Post new topic Reply to topic  [ 6 posts ] 
Author Message
 Post subject: "Light beams" in quartz
PostPosted: Mon Jan 07, 2019 2:52 am 
Offline
Valued Contributor

Joined: Fri Oct 06, 2017 6:12 am
Posts: 122
The "light beams" are consist of numerous needle-like inclusions.
Image
Image
Image
Image
Video:
https://www.youtube.com/watch?v=ph1k2KNPg2M


Top
 Profile  
Reply with quote  
 Post subject: Re: "Light beams" in quartz
PostPosted: Tue Jan 08, 2019 6:30 am 
Offline
Valued Contributor

Joined: Thu Mar 19, 2015 9:55 am
Posts: 496
Rutile? Although I would have expected longer needles.


Top
 Profile  
Reply with quote  
 Post subject: Re: "Light beams" in quartz
PostPosted: Tue Jan 08, 2019 12:34 pm 
Offline
Valued Contributor

Joined: Fri Oct 06, 2017 6:12 am
Posts: 122
Alan F. wrote:
Rutile? Although I would have expected longer needles.

I'm not sure, Tremolite is also possible.


Top
 Profile  
Reply with quote  
 Post subject: Re: "Light beams" in quartz
PostPosted: Tue Jan 08, 2019 1:06 pm 
Offline
Moderator
User avatar

Joined: Mon Apr 02, 2012 9:31 pm
Posts: 3146
Location: North Carolina
It looks very similar to dumortierite in rose quartz. That said I have gotten different results cabbing sheeny lemon quartz (which this resembles) vs rose quartz. Rose quartz tends to produce a 6 ray star, while lemon quartz produced an n-ray star, maybe 24 legs? So many I had trouble counting. Pretty diffuse and best seen with transmitted light.

_________________
https://www.etsy.com/shop/angryturtle


Top
 Profile  
Reply with quote  
 Post subject: Re: "Light beams" in quartz
PostPosted: Wed Jan 09, 2019 1:20 am 
Offline
Valued Contributor

Joined: Fri Oct 06, 2017 6:12 am
Posts: 122
Stephen Challener wrote:
It looks very similar to dumortierite in rose quartz. That said I have gotten different results cabbing sheeny lemon quartz (which this resembles) vs rose quartz. Rose quartz tends to produce a 6 ray star, while lemon quartz produced an n-ray star, maybe 24 legs? So many I had trouble counting. Pretty diffuse and best seen with transmitted light.

Thank you and I agree with you.
It seems that only lemon quartz can produce 18 ray star, but rose quartz can sometimes produce 12 ray star(just very rare).
Found some pics online:


Attachments:
24.jpg
24.jpg [ 43.05 KiB | Viewed 233 times ]
12.jpg
12.jpg [ 73.6 KiB | Viewed 233 times ]
12 p.jpg
12 p.jpg [ 60.73 KiB | Viewed 233 times ]
Top
 Profile  
Reply with quote  
 Post subject: Re: "Light beams" in quartz
PostPosted: Thu Jan 24, 2019 9:30 am 
Offline
Valued Contributor

Joined: Fri Oct 06, 2017 6:12 am
Posts: 122
Not sure if this one contains the same inclusions(the blue inclusions).


Attachments:
4.jpg
4.jpg [ 74.5 KiB | Viewed 138 times ]
Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 6 posts ] 

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