Blue Lalique 'Formose' Glass Vase, 1924

• Circa - A Latin term meaning 'about', often used in the antique trade to give an approximate date for the piece, usually considered to be five years on either side of the circa year. Thus, circa 1900 means the piece was made about 1900, probably between 1895 and 1905. The expression is sometimes abbreviated to c.1900.
• Cased Glass - Cased glass is a type of glassware that is made by sandwiching a layer of one colour of glass between two layers of another colour of glass. This technique is also known as "slip-casting" and "slip-decorated" or "overlay" glass. The process creates a decorative effect by contrasting the colours of the outer layers with the inner layer. The outer layers can be clear, opaque or coloured and the inner layer can be a different colour, or it can be left clear to create a more subtle effect.
  
  The technique was first developed in the 19th century, primarily in Europe, and it was used to produce a wide range of decorative glassware such as vases, bowls, and bottles. Cased glass was particularly popular during the Art Nouveau period, when many glassmakers, including Loetz, Galle, Steuben and Tiffay began to experiment with different colours and designs to create unique and striking pieces of glassware.

This item has been included into following indexes:

• Lalique (France), item types
  • other items 1,103
  • vases 562
• Lalique (France), patterns, vases - Formose 17