Purple pearls are more suitable with silver chains, because silver is a relatively low-key color, which is more suitable for the elegant temperament of purple pearls. The specific reasons are as follows:

1. Silver chain is relatively simple: silver is a relatively simple color, not as conspicuous as gold, but it can highlight the unique charm of purple pearls and make the overall collocation more low-key and elegant.

2. Silver chains are more versatile: silver chains can match most pearl ornaments, while gold chains are more suitable for matching gold ornaments. Therefore, the silver chain is more versatile and can be matched with more different styles of purple pearls.

3. Silver chains are more pearls: Silver chains can highlight the characteristics of Callicarpa, making pearls more conspicuous, while gold chains may make pearls less conspicuous.

To sum up, purple pearls with silver chains are more suitable, which can highlight the elegant temperament of purple pearls and make the overall collocation more low-key and elegant.