A 'Stuart crystal' mourning pendant, late 17th/early 18th century, the oval pendant depicting two

A 'Stuart crystal' mourning pendant, late 17th/early 18th century, the oval pendant depicting two winged cherubs holding a flaming heart, above entwined initials in gold rope twist, on a ground of woven hairwork, beneath a faceted section of rock crystal, mounted in gold, to a later gold curb chain, pendant length 2.0cm, chain length 48cm, chain broken, case stamped SJ Phillips