Hello Patti - very attractive piece - obviously you visit quality shops.

You don't give your location on the globe, so unsure what these might be called in your neck of the woods - but in the U.K. this shape of glassware was described originally as a lidded sweetmeat, and would have been seen on affluent tables from the second half of the C18 until the end of the Regency/beginning Victorian period. Smaller versions are more likely to be called lidded jars.
I would suggest there is a lot of high quality cutting on this one (a method of decoration using grinding wheels and polishing) - although as far as I can see there doesn't appear to be any etching (the use of acid only- instead of grinding wheels).
The colour of the glass appears to be very clear - indicating a possible C20 manufacturing date - although in view of the busy background with leaves etc., the detail is less easy to see. It's very unlikely you'll find a maker - cut glass was made in profusion for over 200 years, and almost none was marked - although sometimes a particular style of cutting can indicate a place of origin.
What sort of wear is on the underside of the base - and are there tiny bubbles or even stones in the glass - both of which, if present, are likely to indicate a pre C20 manufacturing date. Is the condition pristine, or are the signs of wear and abrasion.
If this was period then it should be lead glass i.e. should give a good ring when flicked.
The strawberry diamonds or checkering is particulary attractive, and my personal opinion would be that the cut design of an urn or jar does indicate a more recent manufacture.
Congratulations on finding a great piece, and sorry can't really help with the questions you have asked.