Rare Vintage Scottish Cairngorm Brooch

Historical vintage Scottish Cairngorm brooch, made of sterling silver. This type of brooch is characterized by a large central gemstone, often a citrine or cairngorm quartz, surrounded by colored agates. The brooch in the image features a central orange stone, possibly a citrine or heat-treated amethyst, and is framed by segments of green and brown agate, set in a sterling silver base. Key features of the brooch include: Material: The brooch is made of sterling silver, an alloy consisting of 92.5% silver and 7.5% other metals, usually copper, to increase its durability. Design: The design is typical of Scottish jewelry, incorporating natural stones like agate and citrine, often in geometric or floral patterns. Central Stone: The large orange stone at the center is likely a cairngorm quartz or citrine, popular in Scottish jewelry. Surrounding Agates: The segments of green and brown agate add color and texture to the piece, characteristic of Scottish brooches. Sows some patina: Sterling silver can tarnish over time when exposed to air, humidity, and certain chemicals, but it can be cleaned to restore its shine. 4.3 cm x 3cm Signed/maker’s mark looks like e/R (last 2 pictures) Excellent vintage condition