Brooch Rose gold medallion and eglomised glass

"Brooch Rose Gold And Eglomerated Glass" Medallion Brooch medallion in rose gold 18-carat, made with a frame that opens in two parts. The frame closes with a gold padlock. It is linked to the bélière by four chains, and the bélière inserts into a gold pin to wear it as a brooch. The pin can be removed to wear the medallion as a pendant. At the top of the frame is an additional chain with a gold key at the end, long enough to reach the padlock. The padlock is locked by a notch at the end of the buckle, and opens and closes by applying pressure. Both sides of the medallion feature a beveled glass plate. The bizeaus on the front plate are more elaborate. Inside, a mother-of-pearl plate enhances the eglomised glass work. The front features an eglomized glass miniature of a putto kneeling before an altar. The back is blank, and can accommodate a miniature portrait or, nowadays, a photo. Verre églomisé" is a French term referring to the technique of finely etching a glass plate and then covering it with gold leaf. The reverse side of the plate was then painted black, revealing a design. The name derives from the 18th-century French decorator and art dealer Jean-Baptiste Glomy (1711-1786), who was responsible for its revival. The eglomisé glass technique has existed since antiquity, but was used extensively during the Directoire and Empire periods. The presence of a key or padlock suggests the sentimental value of this miniature jewel. French work from the early 19th century. Two hallmarks in two different places, but not legible. Very fine jewel, good condition, with a few small chips in the eglomisé decoration, and a few micro-scratches on the back glass. Dimensions Total weight: 18.6 grams Length with pin: 9.1 centimetres Length without pin from hoop: 8.2 centimetres Frame length with hooks (top and bottom): 4.8 centimeters Frame length without catches: 4.18 centimeters Frame width: 3.19 centimeters Frame thickness: 5.56 centimeters Pin width: 2.83 centimeters