Layered glass, Tiffanyglass, became very popular and still is today.
分层玻璃、蒂芙尼玻璃都变得非常流行,直到今天依旧如此。
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The stamp was later replaced by Tiffany's initials, which is one way collectors are able to determine the approximate date that a Tiffany Favrile lamp or other glass item was made.