'Both are entirely different...
and both use/used/uses entirely different glass working procedures
to acheive their "very" different results...
When answering the point about Lalique I referred back to the articles that had previously been linked to by Christine to show the descriptors of opalescent glass http://www.patternglass.com/KindOpal/kindOpalHearn.htmhttp://www.glass.co.nz/opalesc.htm
‘There are three kinds of glass known as opalescent. One is blue-tinged, semi-opaque or clear glass with milky opalescence in the center. The colour is produced by the slow cooling of the molten glass in those parts that are thick causing some crystallization inside the glass. This contemporary opalescent glass was first produced in the 1920s and 30s by companies in France such as Lalique, Sabino and Jobling.'
Whilst acknowledging as I did earlier, that I did not know anything about the production of Lalique glass, it seemed to me from this description that the method of obtaining the colour in the glass was the same as that described in the early descriptions of opaline glass – i.e. by cooling and that the description of the glass was very similar to early( 1830’s) descriptions of opaline glass.
'The confusion seems to be be the word: "OPAL" but that is all.
That was not my confusion.
I raised a question because the Count’s description of opaline glass (1832) appeared to be describing glass that is opalescent, and then a further description of opaline glass described a glass made with an opacifier in the batch so that when the piece is cooled it becomes semi-translucent and opalescent. So the query was raised regarding
a) whether or not what was currently ‘termed’ and described as opaline glass really was ( as most of it seemed not to be opalescent)
b) had the makeup of opaline glass changed over time
c) whether or not early accounts were in fact describing opalescent glass as we know it today, rather than opaline glass, but calling it opaline glass.
This then led to a discussion of the various descriptions of opaline glass which have been put forth over the last 180 years and whether the batch make-up/method of making opaline glass might have changed over time or had the descriptions themselves changed.
' Opalescent glass IS opalescent glass... Opaline is NOT opalescent glass...
With regard to the second part of your comment, the Christie’s link I gave earlier shows two large opaline vases which are opalescent, and the link to the book La Cristallerie de Clichy shows early opaline glass that is also opalescent.
And as far as I can ascertain from this thread and the discussions that have been teased out over the thread, it is clear that the early descriptions of opaline glass were describing an opalescent glass. This was opalescent glass produced many decades before Davidson, Fenton, Lalique, Sabino etc.
'Plus... if we look at most glass that is termed as being "Opaline"it does NOT share the same characteristics as the glass that we term as being "Opalescent"
I think that is the issue here, that in the first instance I queried what the definition of opaline glass was because I wondered if what people ‘termed’ opaline really was defined as opaline glass, as the characteristics between the different pieces being ‘termed’ opaline were so diverse and also appeared to be so different from the 1834 definition of opaline given by the Count.
'Both are entirely different. Please see the above links.
The problem with giving links to google images is that what is displayed are just pieces that people have described in a certain way. They are not referenced sources and not always what they are described to be. An example being that when I clicked on opaline I found an image of a Lalique car mascot, which I clicked on to discover it was on Live Auctioneers described as Lalique opaline glass mascot.
'There is for example: PINK, GREEN, BLUE, and many other colour varieties of OPALINE glass.. These same colours will not be applied to OPALESCENT glass, save for description purposes: Blue opalescent or say golden opalescent (for example)
I’m not sure I understand the point you are making. Do you mean that the names for the colours of the glass would be different for translucent glass then for transparent glass please?
- Davidson Pearline was opalescent glass. That was produced in yellow and blue.
- Fenton produced white, blue, green and amethyst as well as canary (see link)http://reviews.ebay.com/Fenton-apos-s-Rare-Vaseline-Opalescent-Glass-of-1905-1929?ugid=10000000004698827
-Northwood produced blue, white and cranberry opalescent'Much OPALINE glass will also contain uranium and will glow under UV black light... '
I cannot comment on quantities but I know a lot of opaline glass does not. Looking at the Clichy book and the opaline glass from Mousa and Amiato Antique and also my own collection, although I know that cannot be a scientific method for working out whether much or not opaline glass contained uranium. 'MOST OPALESCENT glass will not!'
Again production numbers are a difficult thing to ascertain, but it seems to me that a few makers produced opalescent uranium glass I believe: e.g. Davidson, Walsh Walsh, Northwood and Fenton