This type of jewel is called a Stuart crystal. Stuart crystals were mounted in all sort of jewelry, from pins, rings, slides, bracelets and more. Most of the Stuart crystals that survived over the ages are the slide variety, like this one. They became popular in England after 1649, with the execution of the then King of England, Charles I. His loyalists, (the royalists) who wanted to show their sympathy for their fallen monarch would wear small slides set with his portrait or a tress of hair and his initials (in fine gold wire) underneath a faceted crystal.
To find a Stuart crystal slide in this quality with these colors and the depicted scene is really rare, even for us. It is with great pride that we can offer this true collector’s item here at our site.