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В виде вставок в ювелирных изделиях часто встречается не совсем обычный материал – раковина брюхоногих моллюсков, не имеющая перламутрового слоя.

The use of the horn in jewelry has a long history.

For the first time, a polycrystalline aggregate of zirconium oxide stabilized in a cubic system was obtained in the form of ceramics in the 1940s.

Mother-of-pearl inserts are now more and more common in jewelry.

Small, but bizarre in shape, nuggets, mostly gold, they were installed in the form of a central insert.

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