The Mary Gregory Glass made in the United States is identifiable by the child figures that are hand painted with white enamel. The gold-trimmed Mary Gregory pieces are typical European ware.
These particular vases are Czech-Bohemian, they have gold rimmed tops, clear handles and of course the hand-painted children on cranberry glass.Mary Gregory Glass production ran about 50 years, up until the early 1900's. Cranberry is the most popular color, or shall I say, it brings higher prices at an auction. Other popular colors include amethyst, dark blue, green and amber.
If you are a collector of Mary Gregory Glassware you can find some great deals on eBay and every once in awhile there are antique glassware auctions that usually have a variety of Mary Gregory pieces. I went to a fine glass auction a few years ago and there were several hundred antique cruets. The Mary Gregory cruets brought anywhere from $50-$250 each.
There has been a lot of reproduction Mary Gregory type glassware in the past decade. The reproduction pieces can be detected with a magnifying glass, you need to look for screen-printed children with very little hand painting.