Egyptian Revival Silver Brooch with Citrine, Marcasite, and Enamel Wings

• Marcasite - Marcasite is a mineral, iron sulphide, but is rarely used in jewellery. Instead marcasite is the name given to iron pyrites, the mineral sold as marcasite which is identical in copmosition to iron sulphide but crystalises as a cube, making it more suitable for jewellery. It is a brassy yellow in colour and is also known as "fool's gold", and sits well with silver rather than gold becasue of its colour.
  
  Marcasite has been used in jewellery since ancient times and became popular again in jewellery in the 18th century, continuing through to the early 20th century, with the settings becoming cheaper as time progressed, eventually earning the sobriquet "costume jewellery" along with other cheap jewellery that was made for a prevailing pattern and meant to be changed with each new outfit.
• Plique-A-Jour - Plique a jour, which translates from the French as “glimpse of daylight” is a method of enamelling in which the backing is removed or cut away so the light shines through, with a similar effect to a stained glass window. The enamel is held in place by border.
  
  Although the technique of plique-a-jour has been known and in use since the 6th century, it became popular again in the late 19th century, in Russia and Scandinavia. Plique-a-jour was popular in the Art Nouveau period, especially for jewellery.
  
  Because of the length of time required to produce an item, and the high failure rate, production was limited, and the technique is little used today.
• Faceting - Faceting is a technique of removing material from a curved surface, to give a series of flat surfaces but retaining the profile of the original surface.
  
  The technique is most commonly associated with diamond cutting where the various cuts used such as rose cut and brilliant cut, add life and sparkle to the stone, whilst at the same time removing as little of the stone as possible.
  
  Faceting by grinding is also used to decorate glass. The stems of many drinking glasses are decorated by cutting a series of flat surfaces on a circular stem, and hollow vessels such as vases may have faceted surfaces.
  
  In furniture faceting is often applied to legs of tables and chairs, where a circular baluster shaped section is flattened so as to form an octagonal section.

This item has been included into following indexes:

• brooches, set with - marcasite 201
• brooches, silver - silver items 2,659
• plique a jour - jewellery and objects 96