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Old GIA
 
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Rarest Gem? Most expensive?
Quote this post and reply to it Post#1 @ 02-12-02 , 01:42 PM


Since diamonds aren't rare, I was just wondering which gemstone out there is the rarest? Does anybody know???

For the gemologists out there, which gem is the most expensive per carat, is it the diamond? Or is there a more "expensive" stone out there??

Just trying to educate myself, I like to know these things :-)

THANKS!

[Edited by GIA on 02-12-02 at 12:47 PM]


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Well...
Quote this post and reply to it Post#2 @ 02-12-02 , 01:45 PM


Diamonds /can/ be rare. Especially if they're Red (so I hear!).



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Quote this post and reply to it Post#3 @ 02-12-02 , 01:50 PM


Thanks for answering Cassandra. I know that certain diamonds are more rare than others (ie. colored diamonds) but I was more wondering which other gemstone in general is the most rare out there. I was also wondering if the diamond is the most expensive carat per carat.


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Quote this post and reply to it Post#4 @ 02-12-02 , 01:50 PM


Painite is probably the rarest true gem material (sufficiently hard (and attractive) to be worn as a gemstone).
As far as I know from literature, only three crystals have been found until 1979. If any others were found till today-I don't know. The stuff was found in Mogok (Burma), is dark red, strongly pleochroic, has a hardness of 8, an R.I. of 1.78-1.81 and a hardness of 8.

Man-I'd like to have one of those 3 crystals...

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Thomas is right...
Quote this post and reply to it Post#5 @ 02-12-02 , 02:21 PM


...and painite is an example of a gemstone that is so rare that it can't really be marketed as a gemstone. If there are only three in the world, then no one would ever use one in a piece of jewelry, and no demand could ever be built for the item.

I knew there were some rare gemstones like this, but I had no idea that there was anything as rare as only having three crystals ever found.

An interesting question related to the above is what is the rarest gemstone that is "commonly known" among knowledgeable jewelers. I'm stating the question this way, because something like alexandrite is probably not widely known about among the general public, but anyone involved in jewelry has probably heard of it.

With this question, I'd say that ruby is a contender, as is alexandrite.

Of course there are probably boulders of opaque ruby that can be bought for pennies. This is the kind of material you find little carved statues of Buddha made of, for instance. So I suppose, I'm suggesting an implicit qualifier of larger, gem quality material. But in each case, I am specifying a specific variety of gemstone, and not some subset of a variety. For example, I am saying "ruby" as opposed to "Burma ruby," and I would say "diamond" as opposed to "red diamond." (If I allowed something like "red diamond, it would undoubtedly be up there on the rarity scale.)

As I reread what I've written, it sounds a little convoluted, and I hope someone can understand it. I may be entertaining myself, and I apologize if that's the case.

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Thomas...
Quote this post and reply to it Post#6 @ 02-12-02 , 02:37 PM


Do you know exactly where they found these stones? Under what condition? I'm always looking for interesting stones or fossils when I visit beaches. I don't swim, I sit there and study the rocks. I'll have to keep my eyes peeled.

Are there pictures?



[Edited by Cassandra on 02-12-02 at 01:38 PM]

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Quote this post and reply to it Post#7 @ 02-12-02 , 02:50 PM


Gee- I guess this would be a very long stay on the beach... But I think you would make a cute beach-girl Can I join you? If we start now, maybe we'll find one on burmese beaches when we are around 95 years old
Unfortunately, I have not seen any picture of that material. I dont even know if the owners of these crystals are known...

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Quote this post and reply to it Post#8 @ 02-12-02 , 02:54 PM


Quote:
Originally posted by Thomas H.

Man-I'd like to have one of those 3 crystals...



Thomas - I have an extra. My cat likes to play with it on the kitchen floor. Would you like me to send it?

Wonder who has the third one.



LL&... (yeah right)

[Edited by Cupid on 02-12-02 at 01:55 PM]

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Quote this post and reply to it Post#9 @ 02-12-02 , 02:54 PM


There are some Peridot crystals that were faceted into very small gems that came from Pallasite (stony iron) meteorites that hit Earth. I've seen pictures of these and they're really interesting.

Although not as fancy as the terrestrial version, the Pallasite-borne Peridot gems are remarkable. I remember seeing a GIA report on one saying that it had inclusions that had never before been cataloged in any terrestrial gem. It was interestring, the inclusion (kind-of a cloudy matrix) looked like a miniature galaxy.

I think that less than 100 faceted gems were made from these crystals, they go for $10,000+ / Ct. and are mostly less than 2 or 3 points.

I want one! Peridot is the birth stone for my girlfriend and I!

-Jon

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painite
Quote this post and reply to it Post#10 @ 02-12-02 , 02:59 PM



You can see a picture of painite here:

http://minerals.gps.caltech.edu/FIL...inite/Index.htm

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I found one... :)
Quote this post and reply to it Post#11 @ 02-12-02 , 03:03 PM


...But just a picture
I borrowed it from the "caltech" page of George Rossman... (sorry for that...)
At least now we know what to look for

Thomas H.




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Quote this post and reply to it Post#12 @ 02-12-02 , 03:07 PM


found a picture of it here http://minerals.gps.caltech.edu/Fil...inite/Index.htm same link as above

[Edited by tonysgeko on 02-12-02 at 02:09 PM]

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Quote this post and reply to it Post#13 @ 02-12-02 , 03:10 PM


Hehe. Sure Thomas. Hey, you never know! I've got a quick eye. I walked away from an hour stroll on the shores of Lake Huron with a bucket of fossils, including some that are apparently hard to find in that area.



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Quote this post and reply to it Post#14 @ 02-12-02 , 03:27 PM


Allright-when are we leaving? I need a vacation from Tucson anyways...
I was just on your website Cassandra... Nice... very nice...
You got a quick eye... thats good... I am pretty good in finding minerals too, but anyways-I guess we'll be old and gray until we find one of these red crystals...

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Quote this post and reply to it Post#15 @ 02-12-02 , 03:37 PM


Thank you.

Hmm. As soon as I lose enough after-pregnancy chub to fit into a decent bathingsuit, and can convince my parents that they need to not work for two weeks so they can babysit their grandchild. I'll get back with ya. Hehe.

Well, now I'm gonna be looking for crystals no matter /what/ lake I'm at. I've found geodes before too... Never got to crack any of them open, but those all pretty much contain the same types of mineral, right?



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How about....
Quote this post and reply to it Post#16 @ 02-12-02 , 03:40 PM


Bixbite (red beryl)? I have seen some pictures, but you don't hear/see much info about this stone.

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Quote this post and reply to it Post#17 @ 02-12-02 , 04:08 PM


Hey-we got a young mum here... congratulations! I bet it's really cute...

Yeah, most geodes contain pretty much the same, when you are lucky, you find other stuff but quartz and calcite, but thats rare.

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Quote this post and reply to it Post#18 @ 02-12-02 , 04:12 PM


Hellokitty...
Red beryl is rare, but nothing compared to other gems. You cam get hundreds of carats of these beryls from several suppliers. Now there is pretty much one company in this mine. But the stuff is extremely expensive... And they treat nearly all of their material with either ceddarwood oil or epoxy resins... same thing like emeralds...

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Quote this post and reply to it Post#19 @ 02-12-02 , 04:20 PM


Thanks Thomas. I'm not young young. I'll be 23 in July!

I've been afraid to split my geodes open. I don't want to shatter them, or damage what's inside.

The only tools I have for that is a hammer and a chisel.


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Quote this post and reply to it Post#20 @ 02-12-02 , 05:04 PM


Jesus-that's old...!!! So I guess as I am 5, nearly 6 years older than you, I am already a mummy
Sometimes I nearly feel like that, hehehe...

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Quote this post and reply to it Post#21 @ 02-12-02 , 06:19 PM


Thomas... is a mummy?





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Quote this post and reply to it Post#22 @ 02-12-02 , 06:40 PM


>>I've been afraid to split my geodes open. I don't want to shatter them, or damage what's inside.<<

I second that emotion.

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Quote this post and reply to it Post#23 @ 02-12-02 , 07:21 PM


Tztztztz, I got that Cassandra... As I am thinking about it- why the heck "they" use the word mummy in those two senses???? Any relation between them O.k-o.k. now don't take that personal! :-) You look nothing like a "mummy"-mummy

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Quote this post and reply to it Post#24 @ 02-12-02 , 07:27 PM


*grins!* Either reference would be funny. I actually meant Mummy=Mother. As in, Thomas is a mother? That's how I read it the first time.





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Rare Stuff...
Quote this post and reply to it Post#25 @ 02-12-02 , 07:37 PM


Talk about rare, how 'bout the little crystal of natural Cubic Zirconia they found? One little crystal, and we have to identify it as 'Synthetic Cubic Zirconia' on our final gem identification test or be counted wrong... BTW, anyone know when that was found?

But as for 'normal' stones, they tell us at GIA that of the stones everyone knows about, ruby is the most rare (in great qualities). Someone brought by a 15ct Burmese Ruby 6/5 in for us to see a few months back... WOW! Little baby was only going for a couple mil...


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