the Edwardian era or Edwardian period in the United Kingdom covers the reign of King Edward VII, 1901 to 1910 so La Pearl could not be a cultivated pearl as they were produced later in the century. If however, the pearl is a cultured pearl, and the ring is hallmarked with date stamp to verify the period, the pearl could therfore be a latter replacement. Having no drill hole, cultured verse natural is going to be a hard call. Cheers.