Loetz Conch Shell Glass Vase c. Early Loetz vase, shell form in iridescent pearlized decoration known as. 4.5h, minor chips to foot and top rim (see pictures).This antique Bohemia, around 1897, rare Loetz vase in the shape of shell, white opal glass and pink (this is a very rare combination). Glass is mouthblown and iridescent. The conch shell shape was one the most popular motifs in the series of naturalistic glasses produced by the glass manufacture Johann Loetz Witwe. Seashells show many different decorations, among them the types Neptun, Diaspora, Astraä, several different Phenomen decorations, Chiné and Papillon. What is striking about this piece is the flowing decoration that adapts organically to the shape of the vase. Individual light pink coloured Seaweeds, which stand out against the pearl color background, are reminiscent of air bubbles in water and give the impression that the vase is in its natural environment.