The autumn is the season of metal element. It is a very effective season to use coin for Fengshui purpose. Many Fengshui practitioner believe the most effective is the Han dynasty coin. The
next to the best is Tang dynasty coin. Then it is the Qing dynasty
coin. However, those coin might not be difficult to find in antique
stores in China or east Asia, they are very difficult to find in the
west. For beginners use, I would suggest to start with reproductions
that you can easily find in China town or on the web.
To select coin (reproduction), one critical issue is the copper
content. A good coin should contain bout 95% of copper in
weight. Less copper content means lower quality. Needless to say,
avoid wood, clay, plastic or other material reproductions.
The size of the reproduction is constantly in debate. Some believe
that larger is better. Some believes the reproduction should reflect the actual size of the original.
I personally agree
with the second opinion.
The coin should be hang on yellow silk or gold chain. The color that
helps metal element. It is important to notice that color red has
character of fire element.