Rokesley pendant, enameled, with pearl drop, on chain with barrel clasp.  Curving shield form with slightly concave top, and sides that bulge out at the top, then taper downward, and finally flare a bit at the bottom and then come to a point.  Elongated pearl drop descends from point.  Pendant has saw-pierced details and green and purple enamel in the form of an orchid or iris.
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