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Author: | daver1 [ Fri Feb 24, 2017 7:31 pm ] |
Post subject: | emeralds |
Hello everyone, long time no write. My question: can green emeralds have small clear areas in them? Thanks, david. |
Author: | Stephen Challener [ Fri Feb 24, 2017 9:12 pm ] |
Post subject: | Re: emeralds |
You mean colorless areas? Emeralds are often zones with stripea or concentric zones of colorless or lighter green. |
Author: | daver1 [ Fri Feb 24, 2017 10:57 pm ] |
Post subject: | Re: emeralds |
yes, what you wrote. thanks |
Author: | Barbra Voltaire, FGG [ Tue Feb 28, 2017 12:07 am ] |
Post subject: | Re: emeralds |
https://www.gia.edu/gems-gemology/fall- ... ed-emerald |
Author: | GemmyGirl [ Wed May 31, 2017 6:56 pm ] | ||
Post subject: | Re: emeralds | ||
Emeralds from Torrington, Australia are very often colour zoned from clear to green. They are beautiful. Emerald pictured isn't mine, just googled it.
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Author: | Marlow [ Thu Jun 01, 2017 12:35 am ] |
Post subject: | Re: emeralds |
Yes, they are really beautiful. Some look like a bar code in green and colorless. Same in some "emeralds" from Nigeria. "Emerald" course not sure whether they are chromian Aquas or Vanadium Beryl or really emerald. |
Author: | arglthesheep [ Thu Jun 01, 2017 1:52 am ] | ||
Post subject: | Re: emeralds | ||
Yes australian emeralds are known for these kind of "stripes". I have some from Afghanistan and nice ones from Nigeria too. This one is from Nigeria and looks really great...
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Author: | Isi [ Thu Jun 01, 2017 5:58 pm ] |
Post subject: | Re: emeralds |
Which is the direction of the C-axis in relation to the stripes ? Parallel or perpendicular ? |
Author: | Stephen Challener [ Thu Jun 01, 2017 6:16 pm ] |
Post subject: | Re: emeralds |
Stripes are perpendicular to the c-axis (salamiwise). You can of course get hexagonal zoning down the C as well. |
Author: | Brian [ Fri Jun 02, 2017 12:00 pm ] |
Post subject: | Re: emeralds |
Marlow wrote: Yes, they are really beautiful. Some look like a bar code in green and colorless. Same in some "emeralds" from Nigeria. "Emerald" course not sure whether they are chromian Aquas or Vanadium Beryl or really emerald. Depends on how you define emerald. This is the definition I've been using in a couple of gem journal articles... Emerald is a gem variety of beryl whose green color arises primarily from trace impurities of chromium and/or vanadium. Emeralds may also contain trace amounts of iron; this chromophore may add a yellow or blue tint. The Nigerian beryl I've tested contain plenty of Cr in their green regions, so I think it is fair to call them emeralds. Apparently, Dr. Hanni agrees. |
Author: | Marlow [ Fri Jun 02, 2017 5:42 pm ] |
Post subject: | Re: emeralds |
http://mokslozurnalai.lmaleidykla.lt/pu ... 96-100.pdf Some of the nigerian material is neither emerald nor aquamarine. Try to make some pics tomorrow. |
Author: | Tom Herman [ Sat Jun 03, 2017 8:11 pm ] |
Post subject: | Re: emeralds |
Good reading! Thanks for the article. |
Author: | Hardins [ Sat Jul 22, 2017 4:11 am ] |
Post subject: | Re: emeralds |
GemmyGirdl wrote: Emeralds from Torrington, Australia are very often colour zoned from clear to green. They are beautiful. Emerald pictured isn't mine, just googled it. That's a beautiful example. |
Author: | lovejesus87 [ Thu Aug 24, 2017 4:13 am ] | ||
Post subject: | Re: emeralds | ||
Pls I want to mine out the emerald in a rock body roughly the size of a plot of land. It has been confirmed before to contain emerald and we have also seen beryl in the surrounding area. Don't know if to blast it as dat may destroy the emeralds in case its close to the surface. Or would dexpan work in this situation maybe safer. Or how can I can go about it to get the emerald safely out of this hard rock without damaging it
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Author: | Sean Lines [ Fri Aug 25, 2017 10:08 am ] |
Post subject: | Re: emeralds |
Not sure how to get at emeralds in hard rock, But, if I were you I would go back to the board index, scroll down until you find the miners corner. The people there have a lot of experience in extracting gemstones and I'm sure somebody will be able to give you useful information. Good luck What country is the deposit in? |
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