Design and manufacturing reasons. Some Tiffany jewelry itself is not designed for carving weight. For example, some simple styles may only contain a small diamond or other precious stones, so there is no need to write the weight on the nameplate. Sometimes the weight on the nameplate may be omitted, because this is to better protect the privacy and safety of consumers. If the diamonds in jewelry are conspicuous, adding weight marks may make it a potential theft target. In this case, Tiffany may decide to omit the specific weight of the diamond and only list the brand and other necessary information on the nameplate. Tiffany is a famous jewelry, watch and boutique retailer, founded in 1837 and headquartered in new york, USA. The company's product range includes high-grade diamonds, watches, silver ornaments, crystal ornaments, ceramics and dolls. One of the well-known products is its 6-claw platinum diamond ring, which is called "Tiffany inlay" and is the pioneer of modern diamond ring.