What is a Scottish plaid brooch?

A plaid brooch is a large circular fastener historically used to pin heavy woollen tartans and plaids across the shoulder. These robust silver pieces typically feature substantial concentric circles of banded agates and jaspers surrounding a central citrine or cairngorm. Due to their size and weight, they required strong pin stems and secure catches. Victorian makers adapted these functional Highland accessories into fashionable accessories for everyday civilian wear.

How do I care for silver and agate jewellery?

Agate is a hard form of quartz, but the silver mounts and organic components require gentle handling. Clean the metal components with a soft microfibre cloth while avoiding harsh chemical dips that can damage cemented stone settings or discolour natural stones. Store pieces individually in soft pouches to prevent scratching between items. Keep antique horn mulls and vinaigrettes away from excessive moisture and direct heat sources.

Are these pieces marked with silver hallmarks?

Many nineteenth-century items bear British silver hallmarks indicating the assay office, standard and date letter. Common assay marks include Edinburgh, Glasgow, Birmingham and Chester depending on the maker's location. Smaller items and provincial pieces sometimes feature maker stamps or simple silver designations without full date letters. Unmarked mounts remain common in older Scottish tourist jewellery produced in remote areas.

What is the difference between an agate and a jasper?

Agate is a translucent or semi-translucent variety of microcrystalline quartz characterised by distinct colour bands. Jasper is an opaque form of the same mineral family featuring solid earth tones or intricate mottled patterns. Victorian jewellers frequently combined both stones within a single piece to create contrasting visual textures. Both minerals offer high durability for daily wear in rings, bracelets and brooches.