Early 1900's Vintage Sterling Silver Scottish Cairngorm Brooch/Kilt Pin, stamped Sterling Silver and are considered Highly Collectible. This lovely Brooch is in a Scottish Silver Thistle design and in the Center is a large Rose Cut Caringorm Stone (measures approximately 1/2" around) and is surrounded by Hand Cut and Polished Agate stones. All settings, stones and clasp are in very good condition . **** Cairngorm is a type of smoky quartz that is the national gemstone of Scotland. It is found in the Cairngorm Mountains of Scotland and is known for its smoky yellow-brown color. History: Cairngorm was used in traditional Scottish jewelry, such as kilt ornaments, bonnet brooches, and thistle shapes.