Glass Message Board
Glass Identification - Post here for all ID requests => Glass => Topic started by: flying free on October 21, 2009, 07:22:12 PM
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I would appreciate if anyone could help on where this was made please (and or who by if that is possible?) as I am truly stuck having found nothing similar. Also, I bought this because when I saw it, it was lime green - fabulous I thought. Arrived home distracted by children and shopping and opened it later with great anticipation....only to find a great lump (it weighs 1kg - quite a lot for a small ish ashtray?) of pale pink glass :o - very disappointed.
It didn't go where I wanted it to go, so I stuck it in the hall, by chance next to a lamp, which made it glow bright green again ;D - so that is where it has stayed .
I have searched many of the messages and discovered uranium and manganese posts and neodymium (sp?), but I am confused as to why this is pink and glows such a bright green. Unfortunately it won't glow green when I take the photo. I would be grateful for any help.
Many thanks
m
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I think we really need a photo against a plain white background without a flash and under an incandescent light and a fluorescent light. All we can see is kind of brown. Stand your camera on something so it doesn't wobble during the long exposure
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I would imagine it might go green when light is reflected off the surface, while it is pink when light comes through it.
Some pieces of early "Pink and blue Swirls" Isle of Wight Studio Glass do this, but some don't.
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Hi and thank you for your replies.
Christine I have tried to rephotograph but I cannot do one showing what it looks like under the long life lightbulb ::) however two attached. Once it is even near the long life lamp it glows bright lime green, totally, no hint of a pink at all.
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Hi m,
It would seem that you have a piece of Neodymium glass. I recently sold a Sklo Alexandrit vase that had the same characteristics. Pink under daylight and normal room lighting but blue under fluorescent light and the new low power light bulbs.
Google Neodymium glass and you'll see lots of examples and no doubt a better description than I can give.
Hope this helps.
Bryn
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I don't think it's neodymium, that's lilac/purple to blue/light green, as the colour is wrong. There are other colour changing glasses though. I think Zelezny Brod Sklo (ZBS) made a quite a few; this bowl could be ZBS
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Ah! would that be Alexandrite glass Christine? Alexandrite Glass was first commercially produced from purified Neodymium in 1927 in the laboritory of Leo Moser where the name originated.
Bryn
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No Alexandrite is just a particular commercial name for glass containing neodymium compounds. Neodymium is what's called a rare earth metal. There are other rare earth metals whose compounds give different colour changing effects. I don't have time to look right now, I'm supposed to be working (waiting for something to print).
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No need to yell Christine!!.
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Sorry :-*
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Can't help to i.d your piece but I've got a fish that changes colour also,daylight it's the colour in the photo under the new low power bulbs it goes light blue,the flash turns it lilac again so can't get a pic',Keith.
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WRONG!picture you may have guessed,will try again,
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The fish is neodymium and that's an interesting take on its use
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"an interesting take on it's use"sorry am I having a thick day or did I miss something?Keith
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Over white to give a stripey effect; normally neodymium glass is used on its own or sometimes cased over red.
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Right, with you now,bit slow some days,it's my age(excuses)Keith.
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Thank you so much for your replies and help.
I found this topic today (see link below if it works :-[ ) and realised that the green glow I see is lime coloured but under a long life lightbulb. I put it near a fluorescent tube lighting and it goes grey/sage green colour rather than lime.
I have looked at your pictures on neodymium and thanks! they are very pretty. This pink piece is nothing like as pretty a colour and definitely doesn't turn blue at all, so I am assuming not neodymium?
I will have another search and see what more I can find. And Christine thanks for the ZBS lead. As soon as I get a minute I'll have another look.
http://www.glassmessages.com/index.php/topic,3408.msg26486.html#msg26486
Many thanks
m
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A couple of photos to show the type of colour change in neodymium glass. 1st photo in daylight, 2nd fluorescent light.
John
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ooh those pictures are beautiful.
I have managed I think to attach a picture of what the green looks like
very different to the lovely lavender/blue transformation
Thanks for your help it is much appreciated.
m
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The terms dichroic and dichromatic may help in your search
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thank you! and WOW :o I did a lot of reading last night of the various posts ;D
I spent the evening looking at various bits of my glass under different light sources and none of them change at all, they all look as they are and are equally appealing. This piece definitely doesn't work like that(in my eyes).
I worked out that provided it (in its pink form) is put on the right surface and under the right lighting it 'shines'. So on a black surface it looks good lit by halogen lighting from above. It only looks good in daylight when stood in front of a red vase of mine where it picks up the colour and comes to life. And of course under the long life when it shows green it looks beautiful.
So having read all that, would I be making the right assumption that there is a compound in the makeup of the glass that causes this effect under different lighting?
Also would this be a Czech piece? I have searched hundreds of images and only come across two that seem similar in shape and both were Czech pieces.
Thanks
m
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Yes, there is something in the glass, a rare earth metal probably, that transmits different wavelengths of light differently and therefore it appears a different colour under different light sources. It is nothing to do with what you stand it on.
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http://www.glassmessages.com/index.php/topic,3651.msg28391.html#msg28391
Still searching for a maker for my bowl and came across this. I think they are remarkably similar so was of course wondering if mine is Chrbska as well?
m