Just adding some information that I put on your British Glass post of these items. I hope you don't mind

(still VERY envious of your lovely finds

)
On that thread you wrote: ' O
paline has a translucent appearance, and produces the well known sunset glow, ...'
Opaline glass does not always produce the well known sunset glow. It can also be made without this glow.
I think I have got to the bottom at some point of what might cause opaline glass to glow or not (will try and find source and link). It appears in glass made with bone ash but I actually think it's lead arsenate crystals (??) that produce the glow.
Opaline glass made without this glow can be known as 'alabasterglas', e.g. pertaining to glass from Bohemia, and was made for example at Sklarna Annin (Annathal bei Schuttenhofen) in the 1830/40s and I think also the factory Adolfhutte bei Winterberg. That is also opaline glass but it does not glow. It's made with a different composition. I think containing tin oxide.
I do have a source for this information about the opalescent glass that contains (?)Lead arsenate(?) . I will try and find it.
In Venetian glass of the 16th and 17th century this opaline glass with the sunset glow was known as Girasol glass
Opaline glass with the sunset glow is known as opalescent glass but it is still opaline glass.
Opaline glass can appear without this glow dependent on it's chemical constituents.
Opalescent glass can also be made by the way the batch is made up and then the subsequent way it is cooled.