How can I tell if a Tiffany vase is real?

Pair of vases made by Louis Comfort Tiffany, consisting of a bronze and marble sculptural base, each depicting a child holding a thin favrile art glass vase. Made in USA, c. 1900's. ...

An petite opalescent ovoid favrile glass vase in hues of greens and blues by Louis Comfort Tiffany. Etched J C T and numbered on the base. No chips, cracks or repairs.

Offering this scare, decorated Louis Comfort Tiffany favrile gold & lime opal art glass footed vase with gold hooked feather decoration. This vase features a bulbous, tapered body wi...

Be imbued with the genius of Louis Comfort Tiffany with this art glass floriform vase. Created in 1906, it’s more than just a decoration, it's a piece of functional history displayin...

This elegant iridescent gold Favrile art glass vase was made by Tiffany Studios operating under the direction of Louis Comfort Tiffany. Tiffany Favrile Glass was first offered to the public in 1893 and this hand-blown piece dates to the mid-to-late 1920s. The vase has a warm golden glow and was crafted with a wide domed pedestal base that gives way to a ribbed body. The body flares slightly as it rises and transitions dramatically to a wide shallow neck that terminates in a scalloped-edge rim. As seen in the accompanying photographs, the well-balanced piece is nicely proportioned and displays beautifully. The vase stands 8.375" as measured to its tallest point and is 3.75" across the rim. The foot is 4" foot from edge to edge. The piece is free of chips and cracks and is presented in original condition with no restoration or repair. The underside bears a typical Tiffany Studios late production compound number signature reading L. C. Tiffany Inc. - Favrile and includes shape number 1548 followed by serial number 3164 N. This LC Tiffany Favrile vase...

This highly rare and innovative Iridescent Favrile Art Glass Gord Form Vase is by Louis Comfort Tiffany and originates from the United States Circa 1916. This vase is a true gem, wit...