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Author Topic: Do these qualify as chalcedony glass?  (Read 1715 times)

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Offline Ivo

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Do these qualify as chalcedony glass?
« on: May 01, 2012, 10:19:55 AM »
The chalice is 5"=12,5 cm high and ditto across; the base colour is silver nitratre amberish. No idea how the pontil mark was finished - it seems to be etched over.

The bottle is nearly 6" (14,5 irl)  and quite lightweight. The neck is folded inward, the pontil mark is small and untreated.

Ivo
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Offline flying free

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Re: Do these qualify as chalcedony glass?
« Reply #1 on: May 01, 2012, 02:06:40 PM »
Is there a formal definition of 'Chalcedony' glass? or how it is made.  I thought it was glass made to resemble stone?
there are a couple of pieces to the left of the piece on this link if you flick through.
I think these pics might be from the Corning
http://www.flickr.com/photos/unforth/3277669304/in/photostream/
m


Offline flying free

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Re: Do these qualify as chalcedony glass?
« Reply #2 on: May 01, 2012, 02:10:35 PM »
http://www.gardnerandbarr.com/gallery.htm
This one has similarities with your second piece in terms of decor.
m


Offline Paul S.

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Re: Do these qualify as chalcedony glass?
« Reply #3 on: May 01, 2012, 02:13:28 PM »
I'd typed this just prior to m posting..........so some of the information may now have been superseded, but I'll let it run.........

"quite probably, but the bottle more so than the chalice in my opinion, from looking at the pictures  -  the qualification being that the glass must replicate semi-precious stones such as onyx, agate, jasper, and of course chalcedony.    My dictionary says it should be opaque, but when cut a little thin, most of these natural materials are sometimes translucent.       I get the impression that the surface should be reflective (i.e. shiny)  -  the chalice looks matt from my angle.    There are various web sites giving definitions  -  some with images."


Offline flying free

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Re: Do these qualify as chalcedony glass?
« Reply #4 on: May 01, 2012, 02:18:25 PM »
http://www.gardnerandbarr.com/glossary/chalcedony.htm
Gardner and Barr page on Chalcedony glass
I'm not sure I'd say the top piece was Chalcedony Ivo, and the bottom one looks a little 'transparent'.
m


Offline johnphilip

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Re: Do these qualify as chalcedony glass?
« Reply #5 on: May 01, 2012, 02:29:18 PM »
Hi Ivo i have emailed you . :-X i will give you a few quid for one of them then i will have a pair . . ;)


Offline Paul S.

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Re: Do these qualify as chalcedony glass?
« Reply #6 on: May 01, 2012, 02:46:17 PM »
m, we should have hyped them up more to increase the value, and got a commission. ;D


Offline flying free

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Re: Do these qualify as chalcedony glass?
« Reply #7 on: May 01, 2012, 03:07:11 PM »
ok,  well I need to know what they are now.  Are they chalcedony pieces?  are they 19th c Italian?
m


Offline johnphilip

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Re: Do these qualify as chalcedony glass?
« Reply #8 on: May 01, 2012, 04:55:47 PM »
Hi M the bottom one is British circa 1890/1900  in my ever so humble opinion . jp ;) Not Chalcedony .


Offline flying free

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Re: Do these qualify as chalcedony glass?
« Reply #9 on: May 01, 2012, 05:08:55 PM »
Clutha?

 

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