A NOTICE has recently appeared in the daily Press, signed by a number of jewellers, with reference to Japanese “culture” pearls. This notice, besides endorsing the opinion expressed by the diamond, pearl, and precious stones section of the London Chamber of Commerce that “the insertion of foreign matter placed in the oyster” disqualifies the culture pearl from competing with the pearl produced without the aid of man, declares that “cultured ” pearls can be distinguished from Indian pearls.