Late 19th Century / Early 20th Century Scottish Silver Plaid or Kilt Brooch, Natural Stones

This is a late Victorian or early Edwardian Scottish silver plaid or kilt brooch, as an open circle with 6 supporting arms to a raised central mount holding a cairngorm stone with 6 separate collects with various small round quartz stones, to include, cairngorm, smokey quartz and clear but coloured foiled backed rock crystal, these are riveted to the outer rim. No mark or hallmark which is not unusual of Scottish Clan jewellery of this age but does have a makers mark "B&F". It also has an original fixture a hinged loop attached to the back which was for a safety chain. Cleaned but not polished.