Zhenbei bracelets are called "Zhenbei bracelets". Shell bracelets are common in the market, but rare shell bracelets refer to those bracelets made of rare shell materials. These shells may come from a certain sea area or deep sea, or from a certain kind of shells, so the number is limited and it is difficult to obtain, so they are called rare.

Reason explanation:

1. Rare shells: The number of some shell species is very limited, such as coral shell and black pearl shell, which have unique growth environment and can only be found in specific areas or deep sea. Due to the scarcity of these shells, the shell bracelets made naturally become scarce.

2. Difficulties in collection: The supply of rare shell bracelets is limited, mainly because of the difficulties in the collection process. Some shells grow in the deep sea, and divers need to search and collect them in the deep sea, which increases the difficulty and risk of collection and limits the supply.

3. Protection consciousness: With the improvement of people's awareness of natural resources protection, the collection of some rare shells is restricted. In order to protect the ecological environment of these shells and strictly control the number of collections, it further leads to the scarcity of rare shell bracelets.

Extended content:

Besides rare shell bracelets, there are other rare shell jewels, such as rare shell necklaces and earrings. These rare shell products often have unique colors, lines and luster, so they are highly sought after by jewelry lovers and collectors. At the same time, rare shell bracelets also have certain collection value, and their market value may be improved due to scarcity and particularity. Therefore, rare shell bracelets are a unique and valuable choice for those who love shell jewelry and collection culture.