Russian Lily of the Valley Enamel Brooch

• Guilloche - A form of classical decoration consisting of a repeating ornament of interlacing curved bands, sometimes forming circles, and further decorated with rosettes or other flower forms.
  
  The name is derived from the inventor, French engineer Guillot, who invented a mechanical method of inscribing fine repeating patterns on to metallic surfaces.
  
  On enamelled items with guilloche decoration, the surface is firstly engraved with the repeating pattern, and then covered with several layers of enamel, each of which is fired.
  
  Where the item has not been enamelled the form of decoration is usually called "engine turned".
• Roundel - A roundel is a circular disk, medallion or border on a plate or dish, on an object of furniture. A plate or dish will often have a central circular bordered decoration, termed a roundel. In furniture the word is often used instead of the word 'patera' to describe a turned circular decoration. In recent times use of the word has expanded to encompass any circular area on an object.

This item has been included into following indexes:

• brooches, floral design - floral design, silver mounted 212
• brooches, set with - enamel 267
• brooches, silver - silver items 2,617