How do I identify a Loetz vase?

Rare, amazing hand-crafted 20th century Loetz Witwe vase from the Art Nouveau period in Bohemia (former Czech Republic) around 1915. This mesmerizing, so-called "Jack in the pulpit" ...

This antique Art Nouveau art glass vase by Michael Powolny for Loetz is an impressive and highly sought-after art piece from the early 20th cen...

A fine quality Art Nouveau style art glass vase, by Loetz the historic glass maker from the municipality of Austria featuring Alvin Sterling Silver overlay. Overlay in form of open and horizontal patterns with stylized leaves and scrollwork. A great find, handcrafted vase skillfully made using centuries old techniques of art glass works from the world-renowned maker, Loetz. Simply stunning this Art Nouveau glass vase with Alvin Sterling Silver overlay by Loetz would enhance any shelf, table, nightstand or countertop. This is a rare antique Loetz Green Glass...

An exceptional and rare Bohemian art nouveau Phenomen Genre 2/484 (also known as Medici) pattern Loetz vase dating from around 1902. This beautiful vase stands on a rounded spread fo...

Antique Art Nouveau chalice shaped art glass vase created by the Loetz glassworks company, which was active during the late 19th and early 20th centuries, this vase represents a prime example of their artistic mastery. The vase features a cobalt blue ground that adds depth and richness to its overall appearance. Its surface showcases a captivating iridescent wave pattern, which adds a mesmerizing shimmer and dynamic quality to the glass. This iridescence is a hallmark of Loetz glassware and is achieved through the application of special techniques during the glassblowing process. The chalice-form of the vase gives it an elegant and graceful silhouette. This design creates a harmonious balance between the visually striking upper portion and the sturdy base. Loetz glasswares are renowned for their exceptional artistry and their ability to capture and play with light. The Phaenomen Genre 6893 vase, with its dark blue color and iridescent wave pattern, is no exception. When light interacts with the glass, it reveals a captivating range of colors and reflections, making it a visually stunning and attention-grabbing piece. As an antique Loetz glass vase...

Vase, Johann Loetz Witwe, PG 1/413 decoration, circa 1901, signed Material and technique: glass, mould-blown and freeform, reduced and iridescent Bib.: A. Adlerova, E. Ploil, H. R...