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 Sun Aug 09, 2020 7:59 pm

All times are UTC - 4 hours




Post new topic Reply to topic  [ 16 posts ]  Go to page 1, 2  Next
Author Message
 Post subject: Padparadscha from Tanzania
PostPosted: Tue Aug 29, 2006 8:14 pm 
Offline
Gemology Online Übergod
User avatar

Joined: Tue Aug 01, 2006 3:24 am
Posts: 4997
Location: McDonough GA
Hi,

I bought this stone from an ebay seller who claims it is not Be treated. Only standard heat treating he says. I have my doubts.

First, as far as you can tell in the pic, does this qualify as a pad?

Image

Second, assuming is IS be treated, what's the going price for a stone this size, .85 ct.? And for fun, what if its NOT be treated?

Jason


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Wed Sep 13, 2006 6:56 pm 
Offline
Gemology Online Übergod
User avatar

Joined: Mon Oct 17, 2005 2:39 pm
Posts: 3530
Location: San Francisco Bay Area, CA
That's not a pad, IMO. It's too red.

I agree that the likelihood of it being "just" heated is probably slim.


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Thu Sep 14, 2006 3:24 pm 
Offline
Gemology Online Veteran
User avatar

Joined: Fri Sep 08, 2006 7:03 pm
Posts: 606
Location: Sweden
That's no pad IMO either, it's no visible orange in it. An orange shadow though, and an incredible intense colour, which together with the size makes it very probable that it is a Be treated stone, probably not "just heated" anyway. But then, I'm a newbie in the game so don't hold my words for divine truth! :wink:

_________________
If it sounds good, then say it again!


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Thu Sep 14, 2006 3:31 pm 
Offline
Gemology Online Royal Princess

Joined: Mon Oct 17, 2005 10:56 am
Posts: 6462
Location: The frozen north prairie :-/
It IS very pretty, though, Jason. If you like it and didn't pay too much for what you received, you could set it and have a nice gift for a special lady :wink: .


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Sun Sep 17, 2006 10:15 pm 
Offline
Gemology Online Veteran
User avatar

Joined: Mon Oct 17, 2005 1:06 pm
Posts: 718
Location: Bangkok, Thailand
Hi Umba valley in Tanzania is known to produce orange to orange brown sapphire, but this one look really bright compared to what I've seen from Umba. Nevertheless it is not possible to really compare with a photo on a computer screen...
To be sure the best would be to send the stone to a lab or to a knowledgeable gemmologist.
All the best,

_________________
Vincent Pardieu

www.fieldgemology.org
www.conservationgemology.org

The views expressed here are V. Pardieu’s opinions and do not necessarily reflect those of GIA Laboratory Bangkok (http://www.giathai.net)where he is an employee since Dec 2008.


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Sun Sep 17, 2006 10:18 pm 
Offline
Gemology Online Übergod
User avatar

Joined: Tue Aug 01, 2006 3:24 am
Posts: 4997
Location: McDonough GA
Dear MD,

Did you have someone particular in mind? :D


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Mon Sep 18, 2006 11:01 am 
Offline
Gemology Online Royal Princess

Joined: Mon Oct 17, 2005 10:56 am
Posts: 6462
Location: The frozen north prairie :-/
Hmmm ... now that you mention it 8) , I'm always open to receiving gifts :lol:


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Thu Dec 28, 2006 7:17 am 
Offline
Valued Contributor
User avatar

Joined: Thu Jun 15, 2006 3:21 am
Posts: 426
Location: New York City
has anyone ever had a sapphire that wasn't from ceylon cert pad? I never have myself. I haven't had any that the American Sapphire dealers would call Pad either.

as for Pads, i have to ask my guru but historically they can be more pink than orange. That might have even been the standard at one time, pink dominating.

Today the pads sem to be Orange or peach dominating. The killer at the MNH in NY itself is pink challenged.

steve


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Thu Dec 28, 2006 11:40 am 
Offline
Platinum Member

Joined: Wed Nov 23, 2005 12:47 pm
Posts: 2511
Location: Eastern Europe
The color looks great to me - right on target, but very Be and not characteristic for the alleged origin that I've learned to associate with darker shades... Don't take my word though - it looks like the definition of what's a correct pad hue changes and I don't have to be concerned with the latest understanding of it, happily. I've liked them all: the pink-tinged medium tone 'before Africa', the dark ones that got into the pad category with the Tanzanian stones (and are now out?) and perhaps even some of the very washed out stones that are now labeled Pad. It even looks like the most conservative definition calls for something lighter than my personal ideal, but that's just great (price-wise), of course.

On an earlier thread there were some news about a new certification ploy for pad, with a complaint that some recent auction price record breaker would actually fall through the newly-minted cracks! You might want to look that up.

Here's an example of such AGTA paper I referred to: LINK

The comment reads: "Padparadscha is a sapphire variety determine only by color. The above determination did not include an examination to include origin locality"

And refers to a rather saturated sapphire - pink with a tinge of orange rather than the other way around ('orangish-pink, AGTA says). LINK

Also, one with 'East Africa' origin and the 'P' word: LINK. Referring to THIS.


Last edited by valeria102 on Thu Dec 28, 2006 11:42 am, edited 2 times in total.

Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Thu Dec 28, 2006 11:40 am 
Offline
Site Admin
User avatar

Joined: Sun Oct 16, 2005 12:22 pm
Posts: 20289
Location: San Francisco
Does any major gem lab use the word padparadscha?


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Thu Dec 28, 2006 11:43 am 
Offline
Platinum Member

Joined: Wed Nov 23, 2005 12:47 pm
Posts: 2511
Location: Eastern Europe
Barbra Voltaire wrote:
Does any major gem lab use the word padparadscha?


See the AGTAs above, must have been editing while you posted;... other labs do too.


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Thu Dec 28, 2006 11:51 am 
Offline
Site Admin
User avatar

Joined: Sun Oct 16, 2005 12:22 pm
Posts: 20289
Location: San Francisco
Right you are Valeria!
I don't think GIA does, but I could be wrong.

So I guess, the labs that do use the word, base it solely on color and locality has nothing to do with it.

Hi Steve, glad to see you back. :P


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Thu Dec 28, 2006 11:58 am 
Offline
Platinum Member

Joined: Sun Oct 16, 2005 12:42 pm
Posts: 2591
In the LHMC information sheet you will find which labs use the term and which standard/nomenclature they use.


Top
 Profile  
Reply with quote  
 Post subject: Padparadscha Sapphire
PostPosted: Sat Jan 06, 2007 9:14 pm 
Offline
Valued Contributor

Joined: Wed Jan 03, 2007 11:21 pm
Posts: 120
Location: Las Vegas, NV
This is one of my favorite colored stones. Doing evaluation via digital photography is a problem that I TRY to deal with everyday. I always try to color correct as best as I can every stone that I photograph. Unless you are familiar with the elements of color, it isn't an easy task.
And, when I recieve a digital photograph I always wonder if true color rendition is present. Describing color over the telephone doesn't "cut" it. There are systems which describe color but there isn't a UNIVERSAL one at present which everyone uses. Maybe that will change over time, given all of the photographic communication on the Internet.
There are a lot of fancy sapphires held out to be of the padparadscha color quality on sites such as e-bay. I wouldn't advise ANYONE to buy an expensive stone except if they could view it in person and see first-hand what the color really is, rather than what a photograph of it looks like.
Just my two centavos. :roll:

_________________
Best Regards From,
Tom Goodwin, G.G.

"Always do the right thing. Your friends will be gratified and your enemies amazed." -Mark Twain


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Mon Jan 08, 2007 6:06 am 
Offline
Valued Contributor
User avatar

Joined: Thu Jun 15, 2006 3:21 am
Posts: 426
Location: New York City
AGTA certifies Pad. GIA will soon. And the country of origin is?


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 16 posts ]  Go to page 1, 2  Next

All times are UTC - 4 hours


Who is online

Users browsing this forum: No registered users and 0 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