if you have been told that the glass in your first pix are 'opaline' then you have been mis-informed - those pieces really are spatter glass and not opaline.
Spatter glass was produced as cheerful mostly everyday glass and date wise it appears at much the same time as much tango glass which was often in very bright oranges, red and lemon colours - cheap but attractive glass.
We've spilled gallons of ink here, on the GMB, discussing opaline glass, and reading those posts will help you to understand more accurately why opaline is called opaline and has nothing to do with less expensive spatter glass ......... much of the information on opaline was written by m - the lady who has joined me in replying to your question here.

Opaline won't be cased, and is produced in single colours with a semi-opaque appearance and has the looks of a milky substance and as such has earned the vernacular name of 'milk and water' glass.
I think the French were responsible for inventing opaline glass, some time early in the nineteenth century, and factories such as Baccarat made some of the very best - my opinion is that the blue glass you have shown is not opaline.
In your final ebay link to the lamp, it's difficult to relate this item - described as 'Antique Blue Bristol Glass' - to what glass collectors understand as 'Bristol Blue' - which was a deep rich cobalt blue ............ assuming this is what is being implied.
The colour of that lamp might be nearer to turquoise.
Perhaps you should be spending some of your money on books - these will teach you about different kinds of glass - different colours, and at the same time be enjoyable.
P.S. I would agree with what m has suggested regarding how to get an education in glass

- all very sound advice - but at the same time accept the fact that you will make mistakes......... remember..... people who don't make mistakes don't usually make anything - and you can at least learn from making mistakes.
