I saw in the catalog how the lengthy diamond necklaces with complex pendants were often made to be disassembled by the client, so she could have four bracelets, two brooches, and a shorter necklace whenever she got tired of the one big thing.
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I saw that some necklaces could be broken down into separate pieces of jewelry.
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There was a diamond necklace in the whole world that could be disassembled.