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Glass Identification - Post here for all ID requests => Glass => Topic started by: glassaddict on February 06, 2009, 06:32:39 PM

Title: Colour changing duck!
Post by: glassaddict on February 06, 2009, 06:32:39 PM

Today I bought what I thought was a pale pink glass duck, when I brought it home and place it on the dining room table it was dark blue, when I photographed it, it was purple  :huh:
Does anybody know how? why or who made it?
Many thanks,
Hil

http://s59.photobucket.com/albums/g294/bananabons/Glass%20duck/?action=view&current=blue.jpg 

http://s59.photobucket.com/albums/g294/bananabons/Glass%20duck/?action=view&current=blue2.jpg

http://s59.photobucket.com/albums/g294/bananabons/Glass%20duck/?action=view&current=purple.jpg

Moderator: HTML code removed as it doesn't work on the board. Just the link itself is needed Hil.  :thup:

Title: Re: Colour changing duck!
Post by: Pip on February 06, 2009, 07:00:15 PM

Could it be neodymium glass perhaps?  Certainly that goes from pink to a lilacy blue - do a search on this board for neodymium, there are a few topics on the subject.

Title: Re: Colour changing duck!
Post by: johnphilip on February 06, 2009, 07:11:19 PM

The other options are Dichroic or Alexandrit . :angel:

Mod: spelling of dichroic fixed to make search work better  :kissy:

Title: Re: Colour changing duck!
Post by: Lustrousstone on February 06, 2009, 08:02:57 PM

That's definitely neodymium glass (same thing as Alexandrit] but definitely NOT dichroic. Your colour changing is caused by the glass absorbing different wavelengths of light. Dichroism is a light refraction property of crystals.

Here (http://www.mindspring.com/~reyne/neowhatsis.html) is a good website on neodymium glass BUT she is wrong when she uses the word dichroic; what she actually means is dichromatic.

Title: Re: Colour changing duck!
Post by: glassaddict on February 06, 2009, 10:37:19 PM

Thank you Pip JohnPhillip and Christine for the info. Very interesting to read all about it. I guess it is unlikely to be able to pin down a maker or age for this little duck - but nice to know 'how'
Much appreciated.
Hil  :)