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Old or New: How to tell if a piece of Carnival is an example of Classic, old glass or is a contemporary item or a modern reproduction.

wwcga member Craig gave the following advice in answer to the above question. “If a piece is not marked but there is concern as to whether it is contemporary or not, and no reference sources (literary or human) are available, how to ascertain its era (old/new) with relative certainty?

Answer(s): Is the glass noticeably thicker and/or heavier than a piece of the same or close size that is known to not be contemporary? In conjunction with the previous, is the iridescence super shiny and/or gaudy in comparison to known old pieces (even such as super radium Millersburg)?”

Glen Thistlewood added:
I'd like to add an observation to your answer - and it's one that I often use to help collectors differentiate between old and new Carnival. It is a "rule of thumb" and it doesn't always apply, but it certainly may help. Turn the piece upside down and look at its base. Classic American Carnival was virtually never iridized on the bottom (because of the method of manufacture). Contemporary Carnival and much fake (e.g. the Good Lucks from the Far East) are often (but not always) iridized on the base.

An excellent case in hand is the Mary Ann vase. The old Dugan examples are not iridized on the base - the modern repros are iridized on the base. As I said, there are exceptions - eg. much Fenton is not iridized on the base, but it is marked with the Fenton logo, so there should be no problem there.

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