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 Post subject: White YAG garnet - how rare and expencive?
PostPosted: Tue Aug 09, 2011 2:13 pm 
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Hi,i own some white YAG garnets and started to think,how rare are such stones today?I read ,that they were quite expencive at the beginning,but how is now?


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 Post subject: Re: White YAG garnet - how rare and expencive?
PostPosted: Tue Aug 09, 2011 4:05 pm 
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YAG garnet was used as a diamond subtitute in jewellery long time ago,i dont think it has any market now.
cant comment on its rarety.i have never seen any till date,may be ou members who are in this trade for 30 years can tell more about it.

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 Post subject: Re: White YAG garnet - how rare and expencive?
PostPosted: Tue Aug 09, 2011 4:19 pm 
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Morion is temporarily out of stock but they usually sell colorless YAG rough for $1.30/g.or $750/kg.

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 Post subject: Re: White YAG garnet - how rare and expencive?
PostPosted: Wed Aug 10, 2011 5:47 am 
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I can see lots of cubic zirconia yewelry ,but not much Yag yewelry,so it is not so common staff...
Also white colour is quite rare in garnet group.There is white grossular garnets,but i always think,how white they actually are?


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 Post subject: Re: White YAG garnet - how rare and expencive?
PostPosted: Wed Aug 10, 2011 6:02 am 
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kaju wrote:
I can see lots of cubic zirconia yewelry ,but not much Yag yewelry,so it is not so common staff...


yeah, not more so common cos it's been replaced by the CZ as diamond simulant...

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Also white colour is quite rare in garnet group.There is white grossular garnets,but i always think,how white they actually are?


remember we are talking about a man made product, and, yes it's colorless.....

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alberto

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 Post subject: Re: White YAG garnet - how rare and expencive?
PostPosted: Wed Aug 10, 2011 6:17 am 
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I mean that nowadays every 3-rd voman ,who pass me ,wear cubic zirconia or svarovski yewelry and I ,as a woman ,like wear someting different and rare.YAG seams interesting,and I love garnets.


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 Post subject: Re: White YAG garnet - how rare and expencive?
PostPosted: Wed Aug 10, 2011 6:32 am 
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kaju wrote:
.... and rare.


i wouldn't use the word "rare" for a man made gem, uncommon would be more suitable... :wink:

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YAG seams interesting,and I love garnets.


you could consider GGG also, even more "rare" than YAG and with a dispersion of 0.045 it's more similar to the real one among the "uncommon" stuffs :lol:
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 Post subject: Re: White YAG garnet - how rare and expencive?
PostPosted: Wed Aug 10, 2011 8:21 am 
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:lol:

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 Post subject: Re: White YAG garnet - how rare and expencive?
PostPosted: Wed Aug 10, 2011 2:04 pm 
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YAG is an artificial product. Natural colorless garnets are rare. Don't confuse that with a manufactured product.

I sold them a million years ago before CZ was developed. CZ replaced YAG because it is a better simulant.

Sidebar: Before YAG, the artificial diamond of choice was a doublet consisting of strontium titanate topped with colorless sapphire.

If I had to choose a diamond simulant, I'd go with GGG...but CZ fools most everyone and is very inexpensive.


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 Post subject: Re: White YAG garnet - how rare and expencive?
PostPosted: Thu Aug 11, 2011 5:35 am 
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I never see and buy YAG as cheap diamond simulant,i `m not big fan of diamonds at all.For me YAG is just interesting syntetic garnet,not a cheap substitution of diamonds.
Yes,GGG is also in my wish list,all in time.
Also in that list is genuine white grossular garnet,blue garnet and lots of other different kind of garnets ,genuine and synthetic.
I still like to know ,how white is white grossular garnet?Are they totally white or not?


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 Post subject: Re: White YAG garnet - how rare and expencive?
PostPosted: Thu Aug 11, 2011 5:51 am 
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kaju wrote:
I still like to know ,how white is white grossular garnet?Are they totally white or not?


for what i know colorless (not white, white is a colour) grossular garnet is commonly known as leuco garnet. usually they have a very light touch of yellow but there are of course even completely colorless, you can see some samples in an old thread: http://www.gemologyonline.com/Forum/php ... 9&start=60

try to google for it, i've found a related discussion on Mindat and some vendors on the net....

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 Post subject: Re: White YAG garnet - how rare and expencive?
PostPosted: Thu Aug 11, 2011 6:18 am 
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Thanks,very interesting reading material.


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 Post subject: Re: White YAG garnet - how rare and expencive?
PostPosted: Thu Aug 11, 2011 5:01 pm 
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kaju wrote:
I still like to know ,how white is white grossular garnet?Are they totally white or not?

If by "totally white" you mean D-color, probably not. There may be later studies but one published in "Gems & Gemology" (Summer, 1979) graded "colorless" and "near-colorless" Tanzanian grossulars against a GIA diamond Master Set.

The best GIA grade found at that time among "hundreds" of sub-carat stones evaluated was G/H. The best grade found over 1-carat was an I. The typical grades were K and L.

N-grade and darker garnets were considered near-colorless by the authors, and they noticed that "even with a small brilliant cut, an N rated gem is noticeably colored to the naked eye."

They decided true "colorless" grossulars came from Tanzania only at that time. One of their conclusions was: "Such Tanzanian [colorless] grossulars are exceedingly rare and have characteristics that qualify them as desirable gemstones. It appears that most, if not all, "colorless" grossulars from Kenya are not colorless but "near-colorless" with clearly observable green or other tints."

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 Post subject: Re: White YAG garnet - how rare and expencive?
PostPosted: Fri Aug 12, 2011 11:19 am 
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Rick is spot-on (as usual) -- in my experience to date, the "colorless" garnets from TZ do in fact look colorless under some lighting conditions, but have a yellow component that is apparent most of the time. This grossular is from the Lolatema Mts. in TZ and is the closest I've come to colorless:

Image
Grossular Garnet, Lelatema Mtns, Tanzania by ptorraca, on Flickr

Image
Grossular Garnet (pavilion), Lelatema Mtns, Tanzania by ptorraca, on Flickr

I also have some grossular from Kenya that I bought on the last trip, but I don't have any images to share at the moment. The material exhibits a color-shift: it goes from a pastel green to a lighter green, very near colorless in some specimens. None are strong enough to call a 'color change' though. (I think Stevo has some of this material too... maybe he has a decent pic to share.)

peter

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 Post subject: Re: White YAG garnet - how rare and expencive?
PostPosted: Fri Aug 19, 2011 4:19 pm 
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Nice stone Peter!


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