Central cameo 13 century or later? Italian. Enamel decoration, precious stones & semi precious onyx. Surround cameos added in the 16th & 18th century.
Royal Windsor Collection
Cameo were produced firstly by hand carving but when machines became a way to increase production they are were molded, cast, stamped or carved. However hand carved cameo production still continues today. Always view a shell cameo with a lens or magnifier. Hand carved cameos do not have the minute "snow effect" around the edge of the profile where it joins the background, which machine or ultrasonically produced "carved" cameos have. Today fashion cameos used in jewellery, tend to be the one recognizable profile which I have christened "The Popular Goddess" mass produced in many different forms of fashion or costume jewellery or used as embellishment on shoes, clothes and furnishing.
Fashion has seen cameo jewellery raise in popularity in the Victorian era until the fifties and sixties. It waned in fashion in the seventies but has never gone away - as there has always been a minority that love and wear cameos. Which has meant that cameos have continued in production to today.
Cameo collecting is very much personnel taste, many collect just shell cameo and others jet and lava. But there is a growing number who collect plastic and glass cameos. It does not have to be a collection that has large monetary or investment value of today. Fashion will influence the value of antiques (items over 100 years old) and vintage (any item about 25 years old to a hundred) So what is bought at a high price today may depreciate in value in a few years. And of course the reverse happens - items that are of low value in their times, lava and early plastics for example have in relatively few years command a high value now.
Vintage cameo jewellery that is of glass and plastic produced by designer and manufacturers: for example D & E and Sphinx, are commanding quite high prices in today's market. But it could easily be Exquisite, Hollywood or the mass produced cameo The Popular Goddess" in the future Who can predict?
Collecting is up to the individual and should be fun and affordable to each individuals taste.
The Reicharts cameo factory manufacturing a broad range of colours in ultrasonically created cameos.