I don't think there is any reason why my egg may not be Russian Glass.
I'm sure it is 19th century and I think it dates to around 2nd quarter 19th. My opinion is based on the technique, the colour and quality of the base clear glass (see photo attached where it is set between an early perfume bottle and the 20th century engraved clear glass egg - the colour of the glass is decidedly different and stands out visually on my shelf when you look at it), the design of the pattern, the opaline coloured copper ruby glass outer layer.
The shape of it is the same as the cameo egg from Christie's however being egg shaped it's quite difficult to make any comparison at all on shape -unless of course there is a complete difference in shape i.e. tall and slender egg versus rotund egg .
It has the small hole top and bottom with the top ( I thought it was the bottom but it's the top that I think had the pontil attached) especially carefully cut with the star cut, the polished pontil and then the polished hole. I've not seen that technique on any Bohemian eggs.
In fact I've not seen any Bohemian eggs attributed or identified dating to 19th century.**
Russia has a long tradition of eggs. (Bohemia I can't find anything on in terms of eggs, though I am sure many countries must have had a tradition of decorative eggs around Easter and judging by the amount of worn-off decoration hand-painted white eggs around saying 'Easter' on them, certainly in the USA and the UK I think. ) Bohemia was a consideration for me because of the technique and the opaline copper ruby overlay.
As I said, I think the burgundy overlay is copper ruby glass.
Russia produced this certainly very early 19th century (source 'Russian Glass of the 17th-20th Centuries' - Dr Nina Asharina, Dr Tamara Malinina, Dr Liudmila Kazakova - A special Exhibition The Corning Museum of Glass Corning New York, April22-October 14, 1990).
On page 91 they show a picture of a lidded cup with a copper ruby layer and a clear base under layer.
It isn't as dark as the burgundy on my egg but I think that may be because my egg is opaline overlay whereas the mug is not*? It could also be because the layer of glass is thinner, mine appears visually exactly like the Becher colour in Das Bohmische Glas, but I think it might be because it is an opaline version rather than transparent glass.
The mug in the book is described as Maltsov's glassworks, second quarter of the 19th century.
The description reads:
'Colorless glass with dark red (copper ruby) overlay, blown, cut. State History Museum, no 81202/4563 st. Received in 1943.
Dark cherry-coloured glass, colored with copper compounds ("copper ruby"), appeared much later than "gold ruby." It's rarity is evident from an archival document (dated 1841) in which an anonymous correspondent wrote from Prague to St.Petersburg that the chemist Egermanm of Haida was ready to sell the formula for copper ruby glass for 300 talers. However this deal did not materialise because such glass was already made at Russian glassworks. The
Journal of Industry and Trade in 1837 documents that copper ruby glass was then made at the Maltsov, Orlov, and Bakhmetiev glassworks. - Bibliography: Asharina (1978), p. 98.'
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(*note- in contrast the becher in Das Bohmische Glas Band 11 page 106 is I believe also an opaline copper ruby outer layer glass)
**but I have seen
attributed Bohemian eggs in overlay with a clear underlayer dating to this century that then say Ajka and others that I am pretty sure are made in Poland though. That's not to say that Bohemian 19th century overlay glass eggs don't exist, but I've not found any and I think it is less likely than my egg being Russian.
Caveat - my egg 'could' be Bohemian and it 'could' be later in the 19th
