Here's what the maker (Energy Muse) has to say about the coins:
"The Chinese coins used in the practice of feng shui (pronounced "fung shway") are considered to be the most powerful manifesting tools for attracting wealth, prosperity, and endless fortune, especially those from the extremely auspicious Qing (pronunciation similar to the English word "chin") or Ch'ing Dynasty.
Round in external shape, the coins have a square hole in the center. The round shape symbolizes heaven, and the internal square represents earth. When used by humans, the coins represent the engagement luck of "Heaven-Earth-Mankind."
Feng shui tenets call for the coins to be made of fine metal, such as brass or bronze (like the coins used in all Energy Muse coin pieces) rather than resin, which is brittle in nature and lacks the proper "metal energy." These fine metals, with their strength and elegance, have the powerful metal energy needed to even further activate the luck and wealth "chi" (energy flow; defined literally as "air" or "breath")
Well, even if you think this feng shui stuff is a bunch of hooey - this is still a lovely bracelet with it's chunky natural stones and weighty antique charm.