Novembr 16-18—COLUMBIA, SOUTH CAROLINA: Annual show; The Columbia, SC Gem and Mineral Society; Fri. 10-6, Sat. 10-6, Sun. 12-5
Welcome to the GemologyOnline.com Forum
A non-profit Forum for the exchange of gemological ideas
It is currently Sat Nov 17, 2018 3:19 pm

All times are UTC - 4 hours




Post new topic Reply to topic  [ 14 posts ] 
Author Message
 Post subject: Harts range zircons.
PostPosted: Sun Jun 08, 2014 5:01 am 
Offline
Gemology Online Veteran

Joined: Sat Jul 14, 2012 5:11 pm
Posts: 657
Today, a friend at sapphire, meet a visiting miner, who is willing to let me have a couple thousand carats, of Harts Range zircons, from "The mud tank" zone.
Harts Range is in The northern Territory, Australia, about 120 miles from Alice Springs, so very remote, and this material is usually gobbled up when-ever it is found, so seldom gets held in bigger parcels.
There is no commercial mining, only fossicker/diggers, and the small field is rapidly being depleted by the "grey nomads", who go there at this time of year.
He tells me he can let me have stones from 5-12cts, and specials up to 20cts.
Colours are from peach to pinks, apricot, and mauve, and he has tumbled the stone, so internal inspection is easy.
He told me it is hand picked, for facetting.
I am unsure of the exact price he will want, but he will only sell to me, as he says, "if I meet you, and you like the stone!"
He's playing cagey, but I can't blame him, there are plenty of "not nice" people around our diggings.
The hardest part of getting to these parcels, is actually tracking some of these old guys down!
He will be hunting the wily sapphire until about 23rd june, so I will be able to meet with him, and look at his offerings.
I think that a good guide will be in the range of A$5-7/ct.
I will post pics for you when I have viewed.
I hope to report more quality rough, as my network starts to get the word out.
Barry.


Top
 Profile  
Reply with quote  
 Post subject: Re: Harts range zircons.
PostPosted: Sun Jun 08, 2014 9:20 am 
Offline
Moderator
User avatar

Joined: Mon Apr 02, 2012 9:31 pm
Posts: 3011
Location: North Carolina
Remind me, is it Hart's Range zircons that sometimes have problems with fading?


Top
 Profile  
Reply with quote  
 Post subject: Re: Harts range zircons.
PostPosted: Sun Jun 08, 2014 5:38 pm 
Offline
Gemology Online Veteran

Joined: Sat Jul 14, 2012 5:11 pm
Posts: 657
Hi Scaro, I have asked a friend who has been to the area, and is a cutter, and he says no fading.
The deposit is an alluvial, surface occurence, and deep is less than 1ft, with much now only inches down.
harsh conditions in summer, with the old 120 degrees common, so lots of solar exposure.
I will also ask 'earthling", my zircon "guru" for his views.
Barry.


Top
 Profile  
Reply with quote  
 Post subject: Re: Harts range zircons.
PostPosted: Sun Jun 08, 2014 10:08 pm 
Offline
Moderator
User avatar

Joined: Mon Apr 02, 2012 9:31 pm
Posts: 3011
Location: North Carolina
Aha, I tracked down where I got that idea (should have guessed it would be here): viewtopic.php?f=6&t=18048


Top
 Profile  
Reply with quote  
 Post subject: Re: Harts range zircons.
PostPosted: Sun Jun 08, 2014 11:31 pm 
Offline
Gemology Online Veteran

Joined: Sat Jul 14, 2012 5:11 pm
Posts: 657
Thanks Scaro, I just sat with coffee, and read the posts.
Have also emailed "Earthling" for his opinion.
It seems the pale stones are stable, but deep, rich colours not so, and as the posts, and "earthling" tells me, cold dopping is the way to go.
I'm being offered pale material from surface, so will be interesting to talk to the miner, and find out how old the material is.
Barry.


Top
 Profile  
Reply with quote  
 Post subject: Re: Harts range zircons.
PostPosted: Mon Jun 09, 2014 1:48 am 
Offline
Moderator
User avatar

Joined: Mon Apr 02, 2012 9:31 pm
Posts: 3011
Location: North Carolina
For once, couldn't we have a gem where the pale ones fade and the deepest, most beautiful colors are the stable ones? That would be nice.


Top
 Profile  
Reply with quote  
 Post subject: Re: Harts range zircons.
PostPosted: Mon Jun 09, 2014 9:41 am 
Offline
Valued Contributor

Joined: Tue Mar 27, 2012 10:15 am
Posts: 222
Location: Cary, NC
Barry,

Keep me in mind if you come across any large & good pink or purple ones. I'm in for a couple at those prices

_________________
Bob Hodges
(aka Durnik>

Faceter: When turned into a zombie, they stumble around crying "roooouuuuggghhhh"


Top
 Profile  
Reply with quote  
 Post subject: Re: Harts range zircons.
PostPosted: Mon Jun 09, 2014 4:53 pm 
Offline
Gemology Online Veteran

Joined: Sat Jul 14, 2012 5:11 pm
Posts: 657
Bob, you are top of the list.
Pink will be possible, but I doubt purple, they are found in pale mauve though.
Photos as soon as I can.
Barry.


Top
 Profile  
Reply with quote  
 Post subject: Re: Harts range zircons.
PostPosted: Thu Jun 12, 2014 12:23 am 
Offline
Moderator
User avatar

Joined: Mon Apr 02, 2012 9:31 pm
Posts: 3011
Location: North Carolina
I'm looking forward to seeing photos of these stones.

As an unrelated question, does anyone know if Australian zircons ever go blue with heat? I'm looking for material to play with and I've found a bit of Australian material for a reasonable price.
Side note: wow, zircon has gotten a lot more expensive since I was in middle school. I did a project on Cambodian gems and we bought a few to show off; it was amazing how cheap they were back then.


Top
 Profile  
Reply with quote  
 Post subject: Re: Harts range zircons.
PostPosted: Thu Jun 12, 2014 12:31 am 
Offline
Gemology Online Veteran

Joined: Sat Jul 14, 2012 5:11 pm
Posts: 657
Hi Scaro, I believe that the Aussi zircon does not go blue.
The Qld stuff loses colour if wax dopped, but then tends back to its original colour.
Earthling is the acknowledged expert on all manners zircon, maybe you could P.M him.
Barry.


Top
 Profile  
Reply with quote  
 Post subject: Re: Harts range zircons.
PostPosted: Thu Jun 12, 2014 1:08 am 
Offline
Valued Contributor

Joined: Tue Oct 17, 2006 11:33 am
Posts: 402
Location: New Zealand
Actualy it is possible that the Australian Anakie Gemfields zircon turn blue. But it is rare from 50pieces you may succeed with one, very nice oranges are possible. The problem with the oranges is that some of them return towards there original color after a while , the blues are stable.
The harts range Zircons are different to the Anakie ones, more crack´s and inclusions they have to be preformed for the heating otherwise Kaboom!
But really the harts Range stuff is awesome in color not worth tempering with.

_________________
Gemstein.com


Top
 Profile  
Reply with quote  
 Post subject: Re: Harts range zircons.
PostPosted: Thu Jun 12, 2014 1:23 am 
Offline
Moderator
User avatar

Joined: Mon Apr 02, 2012 9:31 pm
Posts: 3011
Location: North Carolina
Thanks to both of you! Sorry for briefly hijacking the thread. I'm still pretty exciting from having a successful anoxic run--plus last weekend I got to see a super-blue zircon in person (similar to the one Earthling posted a picture of earlier), and I was impressed to say the least. Perhaps someday I will have the skills, setup and purchasing power to see one of those come out of my crucible.


Top
 Profile  
Reply with quote  
 Post subject: Re: Harts range zircons.
PostPosted: Sat Dec 26, 2015 5:10 am 
Offline
Valued Contributor

Joined: Mon Sep 15, 2014 6:21 am
Posts: 200
Stephen Challener wrote:
Thanks to both of you! Sorry for briefly hijacking the thread. I'm still pretty exciting from having a successful anoxic run--plus last weekend I got to see a super-blue zircon in person (similar to the one Earthling posted a picture of earlier), and I was impressed to say the least. Perhaps someday I will have the skills, setup and purchasing power to see one of those come out of my crucible.

I have some zircon s from oberon that I have heated after I've cut , from dark red to orange , could probably lighten them more . Would you like some of this material to see if some could turn blue?
Barney


Top
 Profile  
Reply with quote  
 Post subject: Re: Harts range zircons.
PostPosted: Sat Dec 26, 2015 5:13 am 
Offline
Valued Contributor

Joined: Mon Sep 15, 2014 6:21 am
Posts: 200
I put a photo in off the dop post recently , that's the stuff , was originally very dark red . Got any tips for me on heating a parcel of tanzanite I got recent , most is small 5c average , some are a bit greyish , 5 or 6 that I would like to do . Pm your address and ill send some of that zircon if want to try next time you get the kiln going:)
Barney


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 14 posts ] 

All times are UTC - 4 hours


Who is online

Users browsing this forum: No registered users and 4 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